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annotate semicongine/material.nim @ 868:252cbc10b25f

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did: improve/refactor some of the material API
author Sam <sam@basx.dev>
date Wed, 03 Jan 2024 11:19:55 +0700
parents 8fd450acc6f8
children 65afec4cb6c6
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1 import std/tables
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2 import std/strformat
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3 import std/strutils
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4 import std/hashes
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5
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6
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7 import ./core
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8
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9 type
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10 MaterialType* = object
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11 name*: string
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12 vertexAttributes*: Table[string, DataType]
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13 instanceAttributes*: Table[string, DataType]
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14 attributes*: Table[string, DataType]
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15 MaterialData* = object
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16 theType*: MaterialType
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17 name*: string
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18 attributes: Table[string, DataList]
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19
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20 func hasMatchingAttribute*(materialType: MaterialType, attr: ShaderAttribute): bool =
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21 return materialType.attributes.contains(attr.name) and materialType.attributes[attr.name] == attr.theType
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22
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23 func hasMatchingAttribute*(material: MaterialData, attr: ShaderAttribute): bool =
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24 return material.attributes.contains(attr.name) and material.attributes[attr.name].theType == attr.theType
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25
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26 proc hash*(materialType: MaterialType): Hash =
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27 return hash(materialType.name)
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28
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29 proc hash*(materialData: MaterialData): Hash =
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30 return hash(materialData.name)
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31
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32 proc `==`*(a, b: MaterialType): bool =
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33 return a.name == b.name
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34
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35 proc `==`*(a, b: MaterialData): bool =
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36 return a.name == b.name
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37
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38 proc get*[T](material: MaterialData, attributeName: string): seq[T] =
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39 getValues[T](material.attributes[attributeName])[]
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40
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41 proc getDataList*(material: MaterialData, attributeName: string): DataList =
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42 material.attributes[attributeName]
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43
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44 proc getSingle*[T](material: MaterialData, attributeName: string): T =
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45 getValues[T](material.attributes[attributeName])[][0]
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46
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47 let EMPTY_MATERIAL* = MaterialType(
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48 name: "empty material",
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49 vertexAttributes: {"position": Vec3F32}.toTable,
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50 )
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51 let COLORED_MATERIAL* = MaterialType(
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52 name: "single color material",
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53 vertexAttributes: {"position": Vec3F32}.toTable,
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54 attributes: {"color": Vec4F32}.toTable,
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55 )
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56 let VERTEX_COLORED_MATERIAL* = MaterialType(
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57 name: "vertex color material",
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58 vertexAttributes: {
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59 "position": Vec3F32,
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60 "color": Vec4F32,
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61 }.toTable,
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62 )
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63 let SINGLE_COLOR_MATERIAL* = MaterialType(
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64 name: "single color material",
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65 vertexAttributes: {
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66 "position": Vec3F32,
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67 }.toTable,
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68 attributes: {"color": Vec4F32}.toTable
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69 )
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70 let SINGLE_TEXTURE_MATERIAL* = MaterialType(
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71 name: "single texture material",
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72 vertexAttributes: {
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73 "position": Vec3F32,
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74 "uv": Vec2F32,
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75 }.toTable,
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76 attributes: {"baseTexture": TextureType}.toTable
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77 )
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78 let COLORED_SINGLE_TEXTURE_MATERIAL* = MaterialType(
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79 name: "colored single texture material",
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80 vertexAttributes: {
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81 "position": Vec3F32,
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82 "uv": Vec2F32,
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83 }.toTable,
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84 attributes: {"baseTexture": TextureType, "color": Vec4F32}.toTable
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85 )
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86
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87 proc `$`*(materialType: MaterialType): string =
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88 var attributes: seq[string]
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89 for key, value in materialType.attributes.pairs:
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90 attributes.add &"{key}: {value}"
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91 return &"""MaterialType '{materialType.name}' | Attributes: {attributes.join(", ")}"""
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92
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93 proc `$`*(material: MaterialData): string =
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94 var attributes: seq[string]
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95 for key, value in material.attributes.pairs:
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96 attributes.add &"{key}: {value}"
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97 return &"""Material '{material.name}' | Attributes: {attributes.join(", ")}"""
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98
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99 proc initMaterialData*(
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100 theType: MaterialType,
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101 name: string,
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102 attributes: Table[string, DataList],
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103 ): MaterialData =
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104 var theName = name
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105 if theName == "":
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106 theName = &"material instance of '{theType}'"
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107 for matName, theType in theType.attributes.pairs:
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108 assert attributes.contains(matName), &"missing material attribute '{matName}' for {theType}"
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109 assert attributes[matName].theType == theType
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110 MaterialData(
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111 theType: theType,
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112 name: theName,
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113 attributes: attributes,
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114 )
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115
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116 proc initMaterialData*(
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117 theType: MaterialType,
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118 name: string = "",
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119 attributes: openArray[(string, DataList)] = @[],
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120 ): MaterialData =
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121 var theName = name
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122 if theName == "":
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123 theName = &"material instance of '{theType}'"
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124 initMaterialData(theType=theType, name=theName, attributes=attributes.toTable)
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