Mercurial > games > semicongine

annotate semiconginev2/old/resources/mesh.nim @ 1218:56781cc0fc7c compiletime-tests

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did: renamge main package
author sam <sam@basx.dev>
date Wed, 17 Jul 2024 21:01:37 +0700
parents semicongine/old/resources/mesh.nim@a3eb305bcac2
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import std/strutils
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2 import std/json
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3 import std/logging
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4 import std/tables
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5 import std/strformat
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6 import std/streams
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7
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8 import ../mesh
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9 import ../material
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10 import ../core
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11
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12 import ./image
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13
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14 type
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15 glTFHeader = object
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16 magic: uint32
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17 version: uint32
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18 length: uint32
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19 glTFData = object
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20 structuredContent: JsonNode
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21 binaryBufferData: seq[uint8]
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22
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23 const
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24 JSON_CHUNK = 0x4E4F534A
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25 BINARY_CHUNK = 0x004E4942
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26 ACCESSOR_TYPE_MAP = {
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27 5120: Int8,
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28 5121: UInt8,
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29 5122: Int16,
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30 5123: UInt16,
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31 5125: UInt32,
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32 5126: Float32,
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33 }.toTable
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34 SAMPLER_FILTER_MODE_MAP = {
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35 9728: VK_FILTER_NEAREST,
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36 9729: VK_FILTER_LINEAR,
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37 9984: VK_FILTER_NEAREST,
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38 9985: VK_FILTER_LINEAR,
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39 9986: VK_FILTER_NEAREST,
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40 9987: VK_FILTER_LINEAR,
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41 }.toTable
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42 SAMPLER_WRAP_MODE_MAP = {
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43 33071: VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,
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44 33648: VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT,
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45 10497: VK_SAMPLER_ADDRESS_MODE_REPEAT
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46 }.toTable
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47 GLTF_MATERIAL_MAPPING = {
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48 "color": "baseColorFactor",
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49 "emissiveColor": "emissiveFactor",
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50 "metallic": "metallicFactor",
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51 "roughness", "roughnessFactor",
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52 "baseTexture": "baseColorTexture",
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53 "metallicRoughnessTexture": "metallicRoughnessTexture",
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54 "normalTexture": "normalTexture",
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55 "occlusionTexture": "occlusionTexture",
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56 "emissiveTexture": "emissiveTexture",
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57 }.toTable
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58
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59 proc getGPUType(accessor: JsonNode, attribute: string): DataType =
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60 # TODO: no full support for all datatypes that glTF may provide
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61 # semicongine/core/gpu_data should maybe generated with macros to allow for all combinations
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62 let componentType = ACCESSOR_TYPE_MAP[accessor["componentType"].getInt()]
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63 let theType = accessor["type"].getStr()
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64 case theType
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65 of "SCALAR":
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66 return componentType
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67 of "VEC2":
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68 case componentType
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69 of UInt32: return Vec2U32
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70 of Float32: return Vec2F32
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71 else: raise newException(Exception, &"Unsupported data type for attribute '{attribute}': {componentType} {theType}")
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72 of "VEC3":
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73 case componentType
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74 of UInt32: return Vec3U32
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75 of Float32: return Vec3F32
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76 else: raise newException(Exception, &"Unsupported data type for attribute '{attribute}': {componentType} {theType}")
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77 of "VEC4":
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78 case componentType
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79 of UInt32: return Vec4U32
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80 of Float32: return Vec4F32
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81 else: raise newException(Exception, &"Unsupported data type for attribute '{attribute}': {componentType} {theType}")
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82 of "MAT2":
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83 case componentType
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84 of Float32: return Vec4F32
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85 else: raise newException(Exception, &"Unsupported data type for attribute '{attribute}': {componentType} {theType}")
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86 of "MAT3":
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87 case componentType
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88 of Float32: return Vec4F32
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89 else: raise newException(Exception, &"Unsupported data type for attribute '{attribute}': {componentType} {theType}")
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90 of "MAT4":
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91 case componentType
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92 of Float32: return Vec4F32
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93 else: raise newException(Exception, &"Unsupported data type for attribute '{attribute}': {componentType} {theType}")
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94
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95 proc getBufferViewData(bufferView: JsonNode, mainBuffer: seq[uint8], baseBufferOffset = 0): seq[uint8] =
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96 assert bufferView["buffer"].getInt() == 0, "Currently no external buffers supported"
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97
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98 result = newSeq[uint8](bufferView["byteLength"].getInt())
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99 let bufferOffset = bufferView["byteOffset"].getInt() + baseBufferOffset
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100 var dstPointer = addr result[0]
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101
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102 if bufferView.hasKey("byteStride"):
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103 raise newException(Exception, "Unsupported feature: byteStride in buffer view")
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104 copyMem(dstPointer, addr mainBuffer[bufferOffset], result.len)
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105
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106 proc getAccessorData(root: JsonNode, accessor: JsonNode, mainBuffer: seq[uint8]): DataList =
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107 result = InitDataList(thetype = accessor.getGPUType("??"))
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108 result.SetLen(accessor["count"].getInt())
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109
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110 let bufferView = root["bufferViews"][accessor["bufferView"].getInt()]
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111 assert bufferView["buffer"].getInt() == 0, "Currently no external buffers supported"
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112
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113 if accessor.hasKey("sparse"):
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114 raise newException(Exception, "Sparce accessors are currently not implemented")
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115
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116 let accessorOffset = if accessor.hasKey("byteOffset"): accessor["byteOffset"].getInt() else: 0
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117 let length = bufferView["byteLength"].getInt()
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118 let bufferOffset = bufferView["byteOffset"].getInt() + accessorOffset
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119 var dstPointer = result.GetPointer()
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120
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121 if bufferView.hasKey("byteStride"):
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122 warn "Congratulations, you try to test a feature (loading buffer data with stride attributes) that we have no idea where it is used and how it can be tested (need a coresponding *.glb file)."
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123 # we don't support stride, have to convert stuff here... does this even work?
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124 for i in 0 ..< int(result.len):
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125 copyMem(dstPointer, addr mainBuffer[bufferOffset + i * bufferView["byteStride"].getInt()], int(result.thetype.Size))
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126 dstPointer = cast[pointer](cast[uint](dstPointer) + result.thetype.Size)
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127 else:
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128 copyMem(dstPointer, addr mainBuffer[bufferOffset], length)
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129
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130 proc loadImage(root: JsonNode, imageIndex: int, mainBuffer: seq[uint8]): Image[RGBAPixel] =
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131 if root["images"][imageIndex].hasKey("uri"):
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132 raise newException(Exception, "Unsupported feature: Load images from external files")
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133
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134 let bufferView = root["bufferViews"][root["images"][imageIndex]["bufferView"].getInt()]
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135 let imgData = newStringStream(cast[string](getBufferViewData(bufferView, mainBuffer)))
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136
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137 let imageType = root["images"][imageIndex]["mimeType"].getStr()
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138 case imageType
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139 of "image/bmp":
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140 result = ReadBMP(imgData)
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141 of "image/png":
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142 result = ReadPNG(imgData)
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143 else:
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144 raise newException(Exception, "Unsupported feature: Load image of type " & imageType)
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145
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146 proc loadTexture(root: JsonNode, textureIndex: int, mainBuffer: seq[uint8]): Texture =
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147 let textureNode = root["textures"][textureIndex]
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148 result = Texture(isGrayscale: false)
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149 result.colorImage = loadImage(root, textureNode["source"].getInt(), mainBuffer)
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150 result.name = root["images"][textureNode["source"].getInt()]["name"].getStr()
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diff changeset
151 if result.name == "":
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parents:
diff changeset
152 result.name = &"Texture{textureIndex}"
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parents:
diff changeset
153
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Sam <sam@basx.dev>
parents:
diff changeset
154 if textureNode.hasKey("sampler"):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
155 let sampler = root["samplers"][textureNode["sampler"].getInt()]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
156 if sampler.hasKey("magFilter"):
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Sam <sam@basx.dev>
parents:
diff changeset
157 result.sampler.magnification = SAMPLER_FILTER_MODE_MAP[sampler["magFilter"].getInt()]
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Sam <sam@basx.dev>
parents:
diff changeset
158 if sampler.hasKey("minFilter"):
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Sam <sam@basx.dev>
parents:
diff changeset
159 result.sampler.minification = SAMPLER_FILTER_MODE_MAP[sampler["minFilter"].getInt()]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
160 if sampler.hasKey("wrapS"):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
161 result.sampler.wrapModeS = SAMPLER_WRAP_MODE_MAP[sampler["wrapS"].getInt()]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
162 if sampler.hasKey("wrapT"):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
163 result.sampler.wrapModeT = SAMPLER_WRAP_MODE_MAP[sampler["wrapS"].getInt()]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
164
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Sam <sam@basx.dev>
parents:
diff changeset
165
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
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diff changeset
166 proc loadMaterial(root: JsonNode, materialNode: JsonNode, defaultMaterial: MaterialType, mainBuffer: seq[uint8]): MaterialData =
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167 let pbr = materialNode["pbrMetallicRoughness"]
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168 var attributes: Table[string, DataList]
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169
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170 # color
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171 if defaultMaterial.attributes.contains("color"):
1137
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diff changeset
172 attributes["color"] = InitDataList(thetype = Vec4F32)
840
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173 if pbr.hasKey(GLTF_MATERIAL_MAPPING["color"]):
1136
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sam <sam@basx.dev>
parents: 959
diff changeset
174 attributes["color"] = @[NewVec4f(
840
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Sam <sam@basx.dev>
parents:
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175 pbr[GLTF_MATERIAL_MAPPING["color"]][0].getFloat(),
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Sam <sam@basx.dev>
parents:
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176 pbr[GLTF_MATERIAL_MAPPING["color"]][1].getFloat(),
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Sam <sam@basx.dev>
parents:
diff changeset
177 pbr[GLTF_MATERIAL_MAPPING["color"]][2].getFloat(),
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Sam <sam@basx.dev>
parents:
diff changeset
178 pbr[GLTF_MATERIAL_MAPPING["color"]][3].getFloat(),
870
b975eab2b694 did: improve dynamic array, mesh and material APIs a ton, changes in material attributes are now detected and will trigger uniform-updates
Sam <sam@basx.dev>
parents: 869
diff changeset
179 )]
840
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Sam <sam@basx.dev>
parents:
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180 else:
1136
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parents: 959
diff changeset
181 attributes["color"] = @[NewVec4f(1, 1, 1, 1)]
840
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parents:
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182
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Sam <sam@basx.dev>
parents:
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183 # pbr material values
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Sam <sam@basx.dev>
parents:
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184 for factor in ["metallic", "roughness"]:
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Sam <sam@basx.dev>
parents:
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185 if defaultMaterial.attributes.contains(factor):
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parents: 1136
diff changeset
186 attributes[factor] = InitDataList(thetype = Float32)
840
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Sam <sam@basx.dev>
parents:
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187 if pbr.hasKey(GLTF_MATERIAL_MAPPING[factor]):
870
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Sam <sam@basx.dev>
parents: 869
diff changeset
188 attributes[factor] = @[float32(pbr[GLTF_MATERIAL_MAPPING[factor]].getFloat())]
840
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parents:
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189 else:
870
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Sam <sam@basx.dev>
parents: 869
diff changeset
190 attributes[factor] = @[0.5'f32]
840
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Sam <sam@basx.dev>
parents:
diff changeset
191
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Sam <sam@basx.dev>
parents:
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192 # pbr material textures
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Sam <sam@basx.dev>
parents:
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193 for texture in ["baseTexture", "metallicRoughnessTexture"]:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
194 if defaultMaterial.attributes.contains(texture):
1137
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parents: 1136
diff changeset
195 attributes[texture] = InitDataList(thetype = TextureType)
a4aa9f374d44 did: more renaming
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parents: 1136
diff changeset
196 # attributes[texture & "Index"] = InitDataList(thetype=UInt8)
840
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Sam <sam@basx.dev>
parents:
diff changeset
197 if pbr.hasKey(GLTF_MATERIAL_MAPPING[texture]):
870
b975eab2b694 did: improve dynamic array, mesh and material APIs a ton, changes in material attributes are now detected and will trigger uniform-updates
Sam <sam@basx.dev>
parents: 869
diff changeset
198 attributes[texture] = @[loadTexture(root, pbr[GLTF_MATERIAL_MAPPING[texture]]["index"].getInt(), mainBuffer)]
840
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parents:
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199 else:
870
b975eab2b694 did: improve dynamic array, mesh and material APIs a ton, changes in material attributes are now detected and will trigger uniform-updates
Sam <sam@basx.dev>
parents: 869
diff changeset
200 attributes[texture] = @[EMPTY_TEXTURE]
840
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Sam <sam@basx.dev>
parents:
diff changeset
201
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Sam <sam@basx.dev>
parents:
diff changeset
202 # generic material textures
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
203 for texture in ["normalTexture", "occlusionTexture", "emissiveTexture"]:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
204 if defaultMaterial.attributes.contains(texture):
1137
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sam <sam@basx.dev>
parents: 1136
diff changeset
205 attributes[texture] = InitDataList(thetype = TextureType)
a4aa9f374d44 did: more renaming
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parents: 1136
diff changeset
206 # attributes[texture & "Index"] = InitDataList(thetype=UInt8)
840
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Sam <sam@basx.dev>
parents:
diff changeset
207 if materialNode.hasKey(GLTF_MATERIAL_MAPPING[texture]):
870
b975eab2b694 did: improve dynamic array, mesh and material APIs a ton, changes in material attributes are now detected and will trigger uniform-updates
Sam <sam@basx.dev>
parents: 869
diff changeset
208 attributes[texture] = @[loadTexture(root, materialNode[texture]["index"].getInt(), mainBuffer)]
840
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parents:
diff changeset
209 else:
870
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Sam <sam@basx.dev>
parents: 869
diff changeset
210 attributes[texture] = @[EMPTY_TEXTURE]
840
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Sam <sam@basx.dev>
parents:
diff changeset
211
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Sam <sam@basx.dev>
parents:
diff changeset
212 # emissiv color
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Sam <sam@basx.dev>
parents:
diff changeset
213 if defaultMaterial.attributes.contains("emissiveColor"):
1137
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parents: 1136
diff changeset
214 attributes["emissiveColor"] = InitDataList(thetype = Vec3F32)
840
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parents:
diff changeset
215 if materialNode.hasKey(GLTF_MATERIAL_MAPPING["emissiveColor"]):
1136
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sam <sam@basx.dev>
parents: 959
diff changeset
216 attributes["emissiveColor"] = @[NewVec3f(
840
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Sam <sam@basx.dev>
parents:
diff changeset
217 materialNode[GLTF_MATERIAL_MAPPING["emissiveColor"]][0].getFloat(),
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
218 materialNode[GLTF_MATERIAL_MAPPING["emissiveColor"]][1].getFloat(),
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
219 materialNode[GLTF_MATERIAL_MAPPING["emissiveColor"]][2].getFloat(),
870
b975eab2b694 did: improve dynamic array, mesh and material APIs a ton, changes in material attributes are now detected and will trigger uniform-updates
Sam <sam@basx.dev>
parents: 869
diff changeset
220 )]
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
221 else:
1136
71315636ba82 did: refactor naming in tons of places
sam <sam@basx.dev>
parents: 959
diff changeset
222 attributes["emissiveColor"] = @[NewVec3f(1'f32, 1'f32, 1'f32)]
840
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Sam <sam@basx.dev>
parents:
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223
1139
114f395b9144 did: finish refactoring and updated all tests accordingly
sam <sam@basx.dev>
parents: 1138
diff changeset
224 result = InitMaterialData(theType = defaultMaterial, name = materialNode["name"].getStr(), attributes = attributes)
840
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Sam <sam@basx.dev>
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diff changeset
225
882
5392cbd9db41 fix: material handlinge, did: formatting, add: support for multi-material texts
Sam <sam@basx.dev>
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diff changeset
226 proc loadMesh(meshname: string, root: JsonNode, primitiveNode: JsonNode, materials: seq[MaterialData], mainBuffer: seq[uint8]): Mesh =
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
227 if primitiveNode.hasKey("mode") and primitiveNode["mode"].getInt() != 4:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
228 raise newException(Exception, "Currently only TRIANGLE mode is supported for geometry mode")
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
229
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
230 var indexType = None
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
231 let indexed = primitiveNode.hasKey("indices")
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
232 if indexed:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
233 # TODO: Tiny indices
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
234 var indexCount = root["accessors"][primitiveNode["indices"].getInt()]["count"].getInt()
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
235 if indexCount < int(high(uint16)):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
236 indexType = Small
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
237 else:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
238 indexType = Big
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
239
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
240 result = Mesh(
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
241 instanceTransforms: @[Unit4F32],
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
242 indexType: indexType,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
243 name: meshname,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
244 vertexCount: 0,
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
245 )
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
246
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
247 for attribute, accessor in primitiveNode["attributes"].pairs:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
248 let data = root.getAccessorData(root["accessors"][accessor.getInt()], mainBuffer)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
249 if result.vertexCount == 0:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
250 result.vertexCount = data.len
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
251 assert data.len == result.vertexCount
1138
02e1d2658ff5 did: more renaming
sam <sam@basx.dev>
parents: 1137
diff changeset
252 result[].InitVertexAttribute(attribute.toLowerAscii, data)
840
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Sam <sam@basx.dev>
parents:
diff changeset
253
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
254 if primitiveNode.hasKey("material"):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
255 let materialId = primitiveNode["material"].getInt()
882
5392cbd9db41 fix: material handlinge, did: formatting, add: support for multi-material texts
Sam <sam@basx.dev>
parents: 872
diff changeset
256 result[].material = materials[materialId]
840
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Sam <sam@basx.dev>
parents:
diff changeset
257 else:
1139
114f395b9144 did: finish refactoring and updated all tests accordingly
sam <sam@basx.dev>
parents: 1138
diff changeset
258 result[].material = EMPTY_MATERIAL.InitMaterialData()
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
259
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
260 if primitiveNode.hasKey("indices"):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
261 assert result[].indexType != None
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
262 let data = root.getAccessorData(root["accessors"][primitiveNode["indices"].getInt()], mainBuffer)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
263 var tri: seq[int]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
264 case data.thetype
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
265 of UInt16:
869
65afec4cb6c6 did: overhaul dynamic array-api in a few places
Sam <sam@basx.dev>
parents: 868
diff changeset
266 for entry in data[uint16][]:
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
267 tri.add int(entry)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
268 if tri.len == 3:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
269 # FYI gltf uses counter-clockwise indexing
1138
02e1d2658ff5 did: more renaming
sam <sam@basx.dev>
parents: 1137
diff changeset
270 result[].AppendIndicesData(tri[0], tri[1], tri[2])
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
271 tri.setLen(0)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
272 of UInt32:
869
65afec4cb6c6 did: overhaul dynamic array-api in a few places
Sam <sam@basx.dev>
parents: 868
diff changeset
273 for entry in data[uint32][]:
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
274 tri.add int(entry)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
275 if tri.len == 3:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
276 # FYI gltf uses counter-clockwise indexing
1138
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parents: 1137
diff changeset
277 result[].AppendIndicesData(tri[0], tri[1], tri[2])
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
278 tri.setLen(0)
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
279 else:
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
280 raise newException(Exception, &"Unsupported index data type: {data.thetype}")
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
281 # TODO: getting from gltf to vulkan system is still messed up somehow, see other TODO
1138
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parents: 1137
diff changeset
282 Transform[Vec3f](result[], "position", Scale(1, -1, 1))
840
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Sam <sam@basx.dev>
parents:
diff changeset
283
882
5392cbd9db41 fix: material handlinge, did: formatting, add: support for multi-material texts
Sam <sam@basx.dev>
parents: 872
diff changeset
284 proc loadNode(root: JsonNode, node: JsonNode, materials: seq[MaterialData], mainBuffer: var seq[uint8]): MeshTree =
840
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Sam <sam@basx.dev>
parents:
diff changeset
285 result = MeshTree()
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
286 # mesh
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
287 if node.hasKey("mesh"):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
288 let mesh = root["meshes"][node["mesh"].getInt()]
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
289 for primitive in mesh["primitives"]:
882
5392cbd9db41 fix: material handlinge, did: formatting, add: support for multi-material texts
Sam <sam@basx.dev>
parents: 872
diff changeset
290 result.children.add MeshTree(mesh: loadMesh(mesh["name"].getStr(), root, primitive, materials, mainBuffer))
840
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
291
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
292 # transformation
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
293 if node.hasKey("matrix"):
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
parents:
diff changeset
294 var mat: Mat4
44ec744fbedc did: package restructuring according to nimble recommendation for libraries
Sam <sam@basx.dev>
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295 for i in 0 ..< node["matrix"].len:
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296 mat[i] = node["matrix"][i].getFloat()
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297 result.transform = mat
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298 else:
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299 var (t, r, s) = (Unit4F32, Unit4F32, Unit4F32)
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300 if node.hasKey("translation"):
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301 t = Translate(
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302 float32(node["translation"][0].getFloat()),
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303 float32(node["translation"][1].getFloat()),
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304 float32(node["translation"][2].getFloat())
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305 )
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306 if node.hasKey("rotation"):
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307 t = Rotate(
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308 float32(node["rotation"][3].getFloat()),
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309 NewVec3f(
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310 float32(node["rotation"][0].getFloat()),
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311 float32(node["rotation"][1].getFloat()),
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312 float32(node["rotation"][2].getFloat())
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313 )
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314 )
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315 if node.hasKey("scale"):
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316 t = Scale(
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317 float32(node["scale"][0].getFloat()),
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318 float32(node["scale"][1].getFloat()),
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319 float32(node["scale"][2].getFloat())
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320 )
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321 result.transform = t * r * s
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322 result.transform = Scale(1, -1, 1) * result.transform
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323
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324 # children
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325 if node.hasKey("children"):
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326 for childNode in node["children"]:
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327 result.children.add loadNode(root, root["nodes"][childNode.getInt()], materials, mainBuffer)
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328
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329 proc loadMeshTree(root: JsonNode, scenenode: JsonNode, materials: seq[MaterialData], mainBuffer: var seq[uint8]): MeshTree =
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330 result = MeshTree()
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331 for nodeId in scenenode["nodes"]:
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332 result.children.add loadNode(root, root["nodes"][nodeId.getInt()], materials, mainBuffer)
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333 # TODO: getting from gltf to vulkan system is still messed up somehow (i.e. not consistent for different files), see other TODO
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334 # result.transform = Scale(1, -1, 1)
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335 result.updateTransforms()
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336
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337
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338 proc ReadglTF*(stream: Stream, defaultMaterial: MaterialType): seq[MeshTree] =
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339 var
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340 header: glTFHeader
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341 data: glTFData
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342
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343 for name, value in fieldPairs(header):
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344 stream.read(value)
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345
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346 assert header.magic == 0x46546C67
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347 assert header.version == 2
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348
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349 var chunkLength = stream.readUint32()
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350 assert stream.readUint32() == JSON_CHUNK
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351 data.structuredContent = parseJson(stream.readStr(int(chunkLength)))
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352
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353 chunkLength = stream.readUint32()
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354 assert stream.readUint32() == BINARY_CHUNK
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355 data.binaryBufferData.setLen(chunkLength)
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356 assert stream.readData(addr data.binaryBufferData[0], int(chunkLength)) == int(chunkLength)
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357
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358 # check that the refered buffer is the same as the binary chunk
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359 # external binary buffers are not supported
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360 assert data.structuredContent["buffers"].len == 1
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361 assert not data.structuredContent["buffers"][0].hasKey("uri")
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362 let bufferLenDiff = int(chunkLength) - data.structuredContent["buffers"][0]["byteLength"].getInt()
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363 assert 0 <= bufferLenDiff and bufferLenDiff <= 3 # binary buffer may be aligned to 4 bytes
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364
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365 debug "Loading mesh: ", data.structuredContent.pretty
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366
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367 var materials: seq[MaterialData]
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368 for materialnode in data.structuredContent["materials"]:
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369 materials.add data.structuredContent.loadMaterial(materialnode, defaultMaterial, data.binaryBufferData)
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370
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371 for scenedata in data.structuredContent["scenes"]:
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372 result.add data.structuredContent.loadMeshTree(scenedata, materials, data.binaryBufferData)