Mercurial > games > semicongine
annotate src/zamikongine/vertex.nim @ 33:94c38e4b5782
did: refactoring, move more from make to nimscript
| author | Sam <sam@basx.dev> |
|---|---|
| date | Sun, 15 Jan 2023 23:23:54 +0700 |
| parents | 9edca5dc4e93 |
| children | 7f99b21a8777 |
| rev | line source |
|---|---|
| 17 | 1 import std/macros |
| 2 import std/strutils | |
| 3 import std/strformat | |
| 4 import std/typetraits | |
| 5 | |
| 6 import ./math/vector | |
| 32 | 7 import ./math/matrix |
| 17 | 8 import ./vulkan |
| 32 | 9 import ./glsl_helpers |
| 17 | 10 |
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11 type |
| 17 | 12 VertexAttributeType = SomeNumber|Vec |
| 32 | 13 AttributePurpose* = enum |
| 14 Unknown, Position Color | |
| 15 GenericAttribute*[T:VertexAttributeType] = object | |
| 16 data*: seq[T] | |
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17 PositionAttribute*[T:Vec] = object |
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18 data*: seq[T] |
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19 ColorAttribute*[T:Vec] = object |
| 32 | 20 data*: seq[T] |
| 21 VertexAttribute* = GenericAttribute|PositionAttribute|ColorAttribute | |
| 17 | 22 |
| 32 | 23 template getAttributeType*(v: VertexAttribute): auto = get(genericParams(typeof(v)), 0) |
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24 |
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25 func datasize*(attribute: VertexAttribute): uint64 = |
| 32 | 26 uint64(sizeof(getAttributeType(attribute))) * uint64(attribute.data.len) |
| 17 | 27 |
| 28 # from https://registry.khronos.org/vulkan/specs/1.3-extensions/html/chap15.html | |
| 29 func nLocationSlots[T: VertexAttributeType](): int = | |
| 30 when (T is Vec3[float64] or T is Vec3[uint64] or T is Vec4[float64] or T is Vec4[float64]): | |
| 31 2 | |
| 32 else: | |
| 33 1 | |
| 34 | |
| 35 # numbers | |
| 36 func getVkFormat[T: VertexAttributeType](): VkFormat = | |
| 37 when T is uint8: VK_FORMAT_R8_UINT | |
| 38 elif T is int8: VK_FORMAT_R8_SINT | |
| 39 elif T is uint16: VK_FORMAT_R16_UINT | |
| 40 elif T is int16: VK_FORMAT_R16_SINT | |
| 41 elif T is uint32: VK_FORMAT_R32_UINT | |
| 42 elif T is int32: VK_FORMAT_R32_SINT | |
| 43 elif T is uint64: VK_FORMAT_R64_UINT | |
| 44 elif T is int64: VK_FORMAT_R64_SINT | |
| 45 elif T is float32: VK_FORMAT_R32_SFLOAT | |
| 46 elif T is float64: VK_FORMAT_R64_SFLOAT | |
| 47 elif T is Vec2[uint8]: VK_FORMAT_R8G8_UINT | |
| 48 elif T is Vec2[int8]: VK_FORMAT_R8G8_SINT | |
| 49 elif T is Vec2[uint16]: VK_FORMAT_R16G16_UINT | |
| 50 elif T is Vec2[int16]: VK_FORMAT_R16G16_SINT | |
| 51 elif T is Vec2[uint32]: VK_FORMAT_R32G32_UINT | |
| 52 elif T is Vec2[int32]: VK_FORMAT_R32G32_SINT | |
| 53 elif T is Vec2[uint64]: VK_FORMAT_R64G64_UINT | |
| 54 elif T is Vec2[int64]: VK_FORMAT_R64G64_SINT | |
| 55 elif T is Vec2[float32]: VK_FORMAT_R32G32_SFLOAT | |
| 56 elif T is Vec2[float64]: VK_FORMAT_R64G64_SFLOAT | |
| 57 elif T is Vec3[uint8]: VK_FORMAT_R8G8B8_UINT | |
| 58 elif T is Vec3[int8]: VK_FORMAT_R8G8B8_SINT | |
| 59 elif T is Vec3[uint16]: VK_FORMAT_R16G16B16_UINT | |
| 60 elif T is Vec3[int16]: VK_FORMAT_R16G16B16_SINT | |
| 61 elif T is Vec3[uint32]: VK_FORMAT_R32G32B32_UINT | |
| 62 elif T is Vec3[int32]: VK_FORMAT_R32G32B32_SINT | |
| 63 elif T is Vec3[uint64]: VK_FORMAT_R64G64B64_UINT | |
| 64 elif T is Vec3[int64]: VK_FORMAT_R64G64B64_SINT | |
| 65 elif T is Vec3[float32]: VK_FORMAT_R32G32B32_SFLOAT | |
| 66 elif T is Vec3[float64]: VK_FORMAT_R64G64B64_SFLOAT | |
| 67 elif T is Vec4[uint8]: VK_FORMAT_R8G8B8A8_UINT | |
| 68 elif T is Vec4[int8]: VK_FORMAT_R8G8B8A8_SINT | |
| 69 elif T is Vec4[uint16]: VK_FORMAT_R16G16B16A16_UINT | |
| 70 elif T is Vec4[int16]: VK_FORMAT_R16G16B16A16_SINT | |
| 71 elif T is Vec4[uint32]: VK_FORMAT_R32G32B32A32_UINT | |
| 72 elif T is Vec4[int32]: VK_FORMAT_R32G32B32A32_SINT | |
| 73 elif T is Vec4[uint64]: VK_FORMAT_R64G64B64A64_UINT | |
| 74 elif T is Vec4[int64]: VK_FORMAT_R64G64B64A64_SINT | |
| 75 elif T is Vec4[float32]: VK_FORMAT_R32G32B32A32_SFLOAT | |
| 76 elif T is Vec4[float64]: VK_FORMAT_R64G64B64A64_SFLOAT | |
| 77 | |
| 78 | |
| 79 | |
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parents:
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80 func VertexCount*[T](t: T): uint32 = |
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81 for name, value in t.fieldPairs: |
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82 when typeof(value) is VertexAttribute: |
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b55d6ecde79d
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parents:
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83 if result == 0: |
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84 result = uint32(value.data.len) |
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b55d6ecde79d
did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents:
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85 else: |
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did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents:
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86 assert result == uint32(value.data.len) |
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b55d6ecde79d
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parents:
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87 |
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94c38e4b5782
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parents:
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88 func VertexAttributesCount*[T](): uint32 = |
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94c38e4b5782
did: refactoring, move more from make to nimscript
Sam <sam@basx.dev>
parents:
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changeset
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89 for name, value in T().fieldPairs: |
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94c38e4b5782
did: refactoring, move more from make to nimscript
Sam <sam@basx.dev>
parents:
32
diff
changeset
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90 when typeof(value) is VertexAttribute: |
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94c38e4b5782
did: refactoring, move more from make to nimscript
Sam <sam@basx.dev>
parents:
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91 result += 1 |
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94c38e4b5782
did: refactoring, move more from make to nimscript
Sam <sam@basx.dev>
parents:
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diff
changeset
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92 |
| 32 | 93 func generateGLSLVertexDeclarations*[T](): string = |
| 17 | 94 var stmtList: seq[string] |
| 95 var i = 0 | |
| 96 for name, value in T().fieldPairs: | |
| 97 when typeof(value) is VertexAttribute: | |
| 32 | 98 let glsltype = getGLSLType[getAttributeType(value)]() |
| 17 | 99 let n = name |
| 100 stmtList.add(&"layout(location = {i}) in {glsltype} {n};") | |
| 32 | 101 i += nLocationSlots[getAttributeType(value)]() |
| 17 | 102 |
| 103 return stmtList.join("\n") | |
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13
a571db114152
add: vector/matrix modules, tests, nim config script
Sam <sam@basx.dev>
parents:
diff
changeset
|
104 |
| 17 | 105 func generateInputVertexBinding*[T](bindingoffset: int = 0, locationoffset: int = 0): seq[VkVertexInputBindingDescription] = |
| 106 # packed attribute data, not interleaved (aks "struct of arrays") | |
| 107 var binding = bindingoffset | |
| 108 for name, value in T().fieldPairs: | |
| 109 when typeof(value) is VertexAttribute: | |
| 110 result.add( | |
| 111 VkVertexInputBindingDescription( | |
| 112 binding: uint32(binding), | |
| 32 | 113 stride: uint32(sizeof(getAttributeType(value))), |
| 17 | 114 inputRate: VK_VERTEX_INPUT_RATE_VERTEX, # VK_VERTEX_INPUT_RATE_INSTANCE for instances |
| 115 ) | |
| 116 ) | |
| 117 binding += 1 | |
| 118 | |
| 119 func generateInputAttributeBinding*[T](bindingoffset: int = 0, locationoffset: int = 0): seq[VkVertexInputAttributeDescription] = | |
| 120 # packed attribute data, not interleaved (aks "struct of arrays") | |
| 121 var location = 0 | |
| 122 var binding = bindingoffset | |
| 123 for name, value in T().fieldPairs: | |
| 124 when typeof(value) is VertexAttribute: | |
| 125 result.add( | |
| 126 VkVertexInputAttributeDescription( | |
| 127 binding: uint32(binding), | |
| 128 location: uint32(location), | |
| 32 | 129 format: getVkFormat[getAttributeType(value)](), |
| 17 | 130 offset: 0, |
| 131 ) | |
| 132 ) | |
| 32 | 133 location += nLocationSlots[getAttributeType(value)]() |
| 17 | 134 binding += 1 |