Mercurial > games > semicongine

annotate src/zamikongine/mesh.nim @ 38:c3c963e7c1a6

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did: tons of stuff, input, refactoring, fix some errors, some template improvment, sorry for super-commit
author Sam <sam@basx.dev>
date Wed, 18 Jan 2023 09:52:03 +0700
parents 94c38e4b5782
children
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1 import std/typetraits
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2
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3 import ./vulkan
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4 import ./thing
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5 import ./buffer
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6 import ./vertex
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7 import ./math/vector
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8
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9 type
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10 Mesh*[T] = object of Part
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11 vertexData*: T
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12 IndexedMesh*[T: object, U: uint16|uint32] = object of Part
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13 vertexData*: T
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14 indices*: seq[array[3, U]]
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15
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16 func createUberMesh*[T](meshes: openArray[Mesh[T]]): Mesh[T] =
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17 for mesh in meshes:
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18 for srcname, srcvalue in mesh.vertexData.fieldPairs:
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19 when typeof(srcvalue) is VertexAttribute:
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20 for dstname, dstvalue in result.vertexData.fieldPairs:
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21 when srcname == dstname:
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22 dstvalue.data.add srcvalue.data
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23
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24 func createUberMesh*[T: object, U: uint16|uint32](meshes: openArray[IndexedMesh[T, U]]): IndexedMesh[T, U] =
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25 var indexoffset = U(0)
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26 for mesh in meshes:
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27 for srcname, srcvalue in mesh.vertexData.fieldPairs:
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28 when typeof(srcvalue) is VertexAttribute:
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29 for dstname, dstvalue in result.vertexData.fieldPairs:
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30 when srcname == dstname:
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31 dstvalue.data.add srcvalue.data
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32 var indexdata: seq[array[3, U]]
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33 for i in mesh.indices:
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34 indexdata.add [i[0] + indexoffset, i[1] + indexoffset, i[2] + indexoffset]
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35 result.indices.add indexdata
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36 indexoffset += U(mesh.vertexData.VertexCount)
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37
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38 func getVkIndexType[T: object, U: uint16|uint32](m: IndexedMesh[T, U]): VkIndexType =
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39 when U is uint16: VK_INDEX_TYPE_UINT16
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40 elif U is uint32: VK_INDEX_TYPE_UINT32
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41
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42 proc createVertexBuffers*[M: Mesh|IndexedMesh](
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43 mesh: var M,
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44 device: VkDevice,
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45 physicalDevice: VkPhysicalDevice,
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46 commandPool: VkCommandPool,
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47 queue: VkQueue,
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48 useDeviceLocalBuffer: bool = true # decides if data is transfered to the fast device-local memory or not
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49 ): (seq[Buffer], uint32) =
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50 result[1] = mesh.vertexData.VertexCount
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51 for name, value in mesh.vertexData.fieldPairs:
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52 when typeof(value) is VertexAttribute:
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53 assert value.data.len > 0
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54 var flags = if useDeviceLocalBuffer: {TransferSrc} else: {VertexBuffer}
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55 var stagingBuffer = device.InitBuffer(physicalDevice, value.datasize, flags, {VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, VK_MEMORY_PROPERTY_HOST_COHERENT_BIT})
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56 var d: pointer
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57 stagingBuffer.withMapping(d):
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58 copyMem(d, addr(value.data[0]), value.datasize)
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59
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60 if useDeviceLocalBuffer:
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61 var finalBuffer = device.InitBuffer(physicalDevice, value.datasize, {TransferDst, VertexBuffer}, {VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT})
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62 copyBuffer(commandPool, queue, stagingBuffer, finalBuffer, value.datasize)
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63 stagingBuffer.trash()
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64 result[0].add(finalBuffer)
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65 else:
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66 result[0].add(stagingBuffer)
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67
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68 proc createIndexBuffer*(
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69 mesh: var IndexedMesh,
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70 device: VkDevice,
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71 physicalDevice: VkPhysicalDevice,
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72 commandPool: VkCommandPool,
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73 queue: VkQueue,
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74 useDeviceLocalBuffer: bool = true # decides if data is transfered to the fast device-local memory or not
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75 ): Buffer =
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76 let bufferSize = uint64(mesh.indices.len * sizeof(get(genericParams(typeof(mesh.indices)), 0)))
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77 let flags = if useDeviceLocalBuffer: {TransferSrc} else: {IndexBuffer}
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78
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79 var stagingBuffer = device.InitBuffer(physicalDevice, bufferSize, flags, {VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, VK_MEMORY_PROPERTY_HOST_COHERENT_BIT})
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80 var d: pointer
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81 stagingBuffer.withMapping(d):
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82 copyMem(d, addr(mesh.indices[0]), bufferSize)
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83
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84 if useDeviceLocalBuffer:
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85 var finalBuffer = device.InitBuffer(physicalDevice, bufferSize, {TransferDst, IndexBuffer}, {VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT})
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86 copyBuffer(commandPool, queue, stagingBuffer, finalBuffer, bufferSize)
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87 stagingBuffer.trash()
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88 return finalBuffer
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89 else:
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90 return stagingBuffer
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91
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92 proc createIndexedVertexBuffers*(
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93 mesh: var IndexedMesh,
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94 device: VkDevice,
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95 physicalDevice: VkPhysicalDevice,
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96 commandPool: VkCommandPool,
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97 queue: VkQueue,
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98 useDeviceLocalBuffer: bool = true # decides if data is transfered to the fast device-local memory or not
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99 ): (seq[Buffer], Buffer, uint32, VkIndexType) =
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100 result[0] = createVertexBuffers(mesh, device, physicalDevice, commandPool, queue, useDeviceLocalBuffer)[0]
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101 result[1] = createIndexBuffer(mesh, device, physicalDevice, commandPool, queue, useDeviceLocalBuffer)
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102 result[2] = uint32(mesh.indices.len * mesh.indices[0].len)
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103
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104 result[3] = getVkIndexType(mesh)
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105
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106 func squareData*[T:SomeFloat](): auto = PositionAttribute[Vec2[T]](
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107 data: @[Vec2[T]([T(0), T(0)]), Vec2[T]([T(0), T(1)]), Vec2[T]([T(1), T(1)]), Vec2[T]([T(1), T(0)])]
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108 )
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109 func squareIndices*[T:uint16|uint32](): auto = seq[array[3, T]](
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110 @[[T(0), T(1), T(3)], [T(2), T(1), T(3)]]
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111 )