Mercurial > games > semicongine

comparison examples/hello_triangle.nim @ 33:94c38e4b5782

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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
comparison
equal deleted inserted replaced
32:9edca5dc4e93 33:94c38e4b5782
15 type 15 type
16 # define type of vertex 16 # define type of vertex
17 VertexDataA = object 17 VertexDataA = object
18 position: PositionAttribute[Vec2[float32]] 18 position: PositionAttribute[Vec2[float32]]
19 color: ColorAttribute[Vec3[float32]] 19 color: ColorAttribute[Vec3[float32]]
20 Uniforms = object
21 mat: Descriptor[Mat44[float32]]
22 dt: Descriptor[float32]
23 20
24 var pipeline: RenderPipeline[VertexDataA, Uniforms] 21 var pipeline: RenderPipeline[VertexDataA, void]
25 22
26 var pos = 0'f32;
27 var uniforms = Uniforms(
28 mat: Descriptor[Mat44[float32]](value: Unit44f32),
29 dt: Descriptor[float32](value: 0'f32),
30 )
31 var scaledir = 1'f32
32 proc globalUpdate(engine: var Engine, dt: float32) = 23 proc globalUpdate(engine: var Engine, dt: float32) =
33 uniforms.mat.value = uniforms.mat.value * scale3d(1 + scaledir * dt, 1 + scaledir * dt, 0'f32) 24 discard
34 if uniforms.mat.value[0, 0] > 2'f32 or uniforms.mat.value[0, 0] < 0.5'f32:
35 scaledir = - scaledir
36 for buffer in pipeline.uniformBuffers:
37 buffer.updateData(uniforms)
38 echo uniforms.mat.value
39 25
40 # vertex data (types must match the above VertexAttributes) 26 # vertex data (types must match the above VertexAttributes)
41 const 27 const
42 triangle_pos = @[ 28 triangle_pos = @[
43 Vec2([ 0.0'f32, -0.5'f32]), 29 Vec2([ 0.0'f32, -0.5'f32]),
63 var triangle = new Thing 49 var triangle = new Thing
64 # add the triangle mesh to the object 50 # add the triangle mesh to the object
65 triangle.parts.add trianglemesh 51 triangle.parts.add trianglemesh
66 52
67 # upload data, prepare shaders, etc 53 # upload data, prepare shaders, etc
68 const vertexShader = generateVertexShaderCode[VertexDataA, Uniforms]( 54 const vertexShader = generateVertexShaderCode[VertexDataA, void](
69 # have 1 at: 55 # "out_position = uniforms.mat * vec4(in_position, 0, 1);"
70 # [2][0] [0][3]
71 # "out_position = vec4(in_position[0] + uniforms.mat[0][0], in_position[1] + uniforms.mat[0][0], 0, 1);"
72 "out_position = uniforms.mat * vec4(in_position, 0, 1);"
73 # "out_position = vec4(in_position, 0, 1);"
74 ) 56 )
75 const fragmentShader = generateFragmentShaderCode[VertexDataA]() 57 const fragmentShader = generateFragmentShaderCode[VertexDataA]()
76 static: 58 pipeline = setupPipeline[VertexDataA, void, uint16](
77 echo "--------------"
78 for (i, line) in enumerate(vertexShader.splitLines()):
79 echo $(i + 1) & " " & line
80 echo "--------------"
81 echo fragmentShader
82 echo "--------------"
83 pipeline = setupPipeline[VertexDataA, Uniforms, uint16](
84 myengine, 59 myengine,
85 triangle, 60 triangle,
86 vertexShader, 61 vertexShader,
87 fragmentShader 62 fragmentShader
88 ) 63 )