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comparison examples/E02_squares.nim @ 136:fc5db4f1f94e

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did: rewrite example 02 with new engine approach
author Sam <sam@basx.dev>
date Thu, 20 Apr 2023 23:46:22 +0700
parents 779607656b12
children ac2b6777c5db
comparison
equal deleted inserted replaced
135:250e1dcbfec9 136:fc5db4f1f94e
1 import std/times 1 import std/times
2 import std/sequtils
2 import std/strutils 3 import std/strutils
3 import std/math 4 import std/math
4 import std/random 5 import std/random
5 6
6 import semicongine 7 import semicongine
7 8
8 type
9 VertexDataA = object
10 position11: PositionAttribute[Vec2]
11 color22: ColorAttribute[Vec3]
12 index: GenericAttribute[uint32]
13 Uniforms = object
14 t: Descriptor[float32]
15
16 var
17 pipeline: RenderPipeline[VertexDataA, Uniforms]
18 uniformdata = Uniforms(t: Descriptor[float32](value: 0'f32))
19
20 proc globalUpdate(engine: var Engine, t, dt: float32) =
21 uniformdata.t.value += dt
22 engine.vulkan.device.updateUniformData(pipeline, uniformdata)
23 9
24 when isMainModule: 10 when isMainModule:
25 randomize() 11 randomize()
26 var myengine = igniteEngine("Squares")
27 const 12 const
28 COLUMNS = 10 13 COLUMNS = 10
29 ROWS = 10 14 ROWS = 10
30 WIDTH = 2'f32 / COLUMNS 15 WIDTH = 2'f32 / COLUMNS
31 HEIGHT = 2'f32 / ROWS 16 HEIGHT = 2'f32 / ROWS
32 var 17 var
33 vertices: array[COLUMNS * ROWS * 4, Vec2] 18 vertices: array[COLUMNS * ROWS * 4, Vec3f]
34 colors: array[COLUMNS * ROWS * 4, Vec3] 19 colors: array[COLUMNS * ROWS * 4, Vec3f]
35 iValues: array[COLUMNS * ROWS * 4, uint32] 20 iValues: array[COLUMNS * ROWS * 4, uint32]
36 indices: array[COLUMNS * ROWS * 2, array[3, uint16]] 21 indices: array[COLUMNS * ROWS * 2, array[3, uint16]]
37 22
38 for row in 0 ..< ROWS: 23 for row in 0 ..< ROWS:
39 for col in 0 ..< COLUMNS: 24 for col in 0 ..< COLUMNS:
40 let 25 let
41 y: float32 = (row * 2 / COLUMNS) - 1 26 y: float32 = (row * 2 / COLUMNS) - 1
42 x: float32 = (col * 2 / ROWS) - 1 27 x: float32 = (col * 2 / ROWS) - 1
43 color = Vec3([(x + 1) / 2, (y + 1) / 2, 0'f32]) 28 color = Vec3f([(x + 1) / 2, (y + 1) / 2, 0'f32])
44 squareIndex = row * COLUMNS + col 29 squareIndex = row * COLUMNS + col
45 vertIndex = squareIndex * 4 30 vertIndex = squareIndex * 4
46 vertices[vertIndex + 0] = Vec2([x, y]) 31 vertices[vertIndex + 0] = newVec3f(x, y)
47 vertices[vertIndex + 1] = Vec2([x + WIDTH, y]) 32 vertices[vertIndex + 1] = newVec3f(x + WIDTH, y)
48 vertices[vertIndex + 2] = Vec2([x + WIDTH, y + HEIGHT]) 33 vertices[vertIndex + 2] = newVec3f(x + WIDTH, y + HEIGHT)
49 vertices[vertIndex + 3] = Vec2([x, y + HEIGHT]) 34 vertices[vertIndex + 3] = newVec3f(x, y + HEIGHT)
50 colors[vertIndex + 0] = color 35 colors[vertIndex + 0] = color
51 colors[vertIndex + 1] = color 36 colors[vertIndex + 1] = color
52 colors[vertIndex + 2] = color 37 colors[vertIndex + 2] = color
53 colors[vertIndex + 3] = color 38 colors[vertIndex + 3] = color
54 iValues[vertIndex + 0] = uint32(squareIndex) 39 iValues[vertIndex + 0] = uint32(squareIndex)
55 iValues[vertIndex + 1] = uint32(squareIndex) 40 iValues[vertIndex + 1] = uint32(squareIndex)
56 iValues[vertIndex + 2] = uint32(squareIndex) 41 iValues[vertIndex + 2] = uint32(squareIndex)
57 iValues[vertIndex + 3] = uint32(squareIndex) 42 iValues[vertIndex + 3] = uint32(squareIndex)
58 indices[squareIndex * 2 + 0] = [uint16(vertIndex + 0), uint16(vertIndex + 43 indices[squareIndex * 2 + 0] = [uint16(vertIndex + 0), uint16(vertIndex + 1), uint16(vertIndex + 2)]
59 1), uint16(vertIndex + 2)] 44 indices[squareIndex * 2 + 1] = [uint16(vertIndex + 2), uint16(vertIndex + 3), uint16(vertIndex + 0)]
60 indices[squareIndex * 2 + 1] = [uint16(vertIndex + 2), uint16(vertIndex +
61 3), uint16(vertIndex + 0)]
62 45
63 46
64 type PIndexedMesh = Mesh[VertexDataA, 47 const
65 uint16] # required so we can use ctor with ref/on heap 48 vertexInput = @[
66 var squaremesh = PIndexedMesh( 49 attr[Vec3f]("position", memoryLocation=VRAM),
67 vertexData: VertexDataA( 50 attr[Vec3f]("color", memoryLocation=VRAM), # TODO: VRAMVisible
68 position11: PositionAttribute[Vec2](data: @vertices), 51 attr[uint32]("index", memoryLocation=VRAM),
69 color22: ColorAttribute[Vec3](data: @colors), 52 ]
70 index: GenericAttribute[uint32](data: @iValues), 53 vertexOutput = @[attr[Vec3f]("outcolor")]
71 ), 54 uniforms = @[attr[float32]("time")]
72 indexed: true, 55 fragOutput = @[attr[Vec4f]("color")]
73 indices: @indices 56 vertexCode = compileGlslShader(
57 stage=VK_SHADER_STAGE_VERTEX_BIT,
58 inputs=vertexInput,
59 uniforms=uniforms,
60 outputs=vertexOutput,
61 main="""
62 float pos_weight = index / 100.0; // add some gamma correction?
63 float t = sin(Uniforms.time * 0.5) * 0.5 + 0.5;
64 float v = min(1, max(0, pow(pos_weight - t, 2)));
65 v = pow(1 - v, 3000);
66 outcolor = vec3(color.r, color.g, v * 0.5);
67 gl_Position = vec4(position, 1.0);
68 """
69 )
70 fragmentCode = compileGlslShader(
71 stage=VK_SHADER_STAGE_FRAGMENT_BIT,
72 inputs=vertexOutput,
73 uniforms=uniforms,
74 outputs=fragOutput,
75 main="color = vec4(outcolor, 1);"
76 )
77 var squaremesh = newMesh(
78 positions=vertices,
79 indices=indices,
80 colors=colors,
74 ) 81 )
75 var scene = newThing("scene", newThing("squares", squaremesh)) 82 setMeshData[uint32](squaremesh, "index", iValues.toSeq)
76 83
77 const vertexShader = generateVertexShaderCode[VertexDataA, Uniforms]( 84 var myengine = initEngine("Squares")
78 """ 85 myengine.setRenderer(myengine.gpuDevice.simpleForwardRenderPass(vertexCode, fragmentCode))
79 float pos_weight = index / 100.0; // add some gamma correction? 86
80 float t = sin(uniforms.t * 0.5) * 0.5 + 0.5; 87 var scene = newEntity("scene", newEntity("squares", squaremesh))
81 float v = min(1, max(0, pow(pos_weight - t, 2))); 88 myengine.addScene(scene, vertexInput)
82 v = pow(1 - v, 3000); 89 var time = initShaderGlobal("time", 0.0'f32)
83 out_color = vec4(in_color.r, in_color.g, v * 0.5, 1.0); 90 scene.components.add time
84 """ 91 while myengine.running and not myengine.keyWasPressed(Escape):
85 ) 92 myengine.updateInputs()
86 const fragmentShader = generateFragmentShaderCode[VertexDataA]() 93 setValue[float32](time.value, get[float32](time.value) + 0.0005)
87 static: 94 myengine.renderScene(scene)
88 echo vertexShader 95
89 pipeline = setupPipeline[VertexDataA, Uniforms, uint16]( 96 myengine.destroy()
90 myengine,
91 scene,
92 vertexShader,
93 fragmentShader
94 )
95 myengine.run(pipeline, globalUpdate)
96 pipeline.trash()
97 myengine.trash()