annotate tests/test_mesh.nim @ 785:1880ab140165

add: first complete working version of multiple materials and shaders per scene, yipie :)
author Sam <sam@basx.dev>
date Sat, 19 Aug 2023 23:30:25 +0700
parents a2c14402acd2
children 27aaf43e18b4
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1 import std/sequtils
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2 import std/tables
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3 import semicongine
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4
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5 proc main() =
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6 var ent1 = newEntity("hoho", {"mesh": Component(rect())})
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7 var ent2 = newEntity("hehe", [], ent1)
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8 var myScene = newScene("hi", ent2)
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9 myScene.root.transform = translate3d(0.2'f32, 0'f32, 0'f32)
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10 myScene.root[0].transform = translate3d(0'f32, 0.2'f32, 0'f32)
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11 var scenes = [
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12 # loadScene("default_cube.glb", "1"),
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13 # loadScene("default_cube1.glb", "3"),
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14 # loadScene("default_cube2.glb", "4"),
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15 # loadScene("flat.glb", "5"),
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16 loadScene("tutorialk-donat.glb", "6"),
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17 # myScene,
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18 # loadScene("personv3.glb", "2"),
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19 ]
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20
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21 var engine = initEngine("Test meshes")
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22 const
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23 vertexInput = @[
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24 attr[Vec3f]("position", memoryPerformanceHint=PreferFastRead),
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25 attr[uint16]("materialIndex", memoryPerformanceHint=PreferFastRead),
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26 attr[Vec2f]("texcoord_0", memoryPerformanceHint=PreferFastRead),
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27 attr[Mat4]("transform", memoryPerformanceHint=PreferFastWrite, perInstance=true),
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28 ]
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29 intermediate = @[
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30 attr[Vec4f]("vertexColor"),
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31 attr[Vec2f]("colorTexCoord"),
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32 attr[uint16]("materialIndexOut", noInterpolation=true)
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33 ]
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34 fragOutput = @[attr[Vec4f]("color")]
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35 uniforms = @[
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36 attr[Mat4]("projection"),
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37 attr[Mat4]("view"),
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38 attr[Vec4f]("baseColorFactor", arrayCount=4),
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39 ]
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40 samplers = @[attr[Sampler2DType]("baseColorTexture", arrayCount=4)]
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41 (vertexCode, fragmentCode) = compileVertexFragmentShaderSet(
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42 inputs=vertexInput,
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43 intermediate=intermediate,
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44 outputs=fragOutput,
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45 uniforms=uniforms,
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46 samplers=samplers,
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47 vertexCode="""
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48 gl_Position = vec4(position, 1.0) * (transform * Uniforms.view * Uniforms.projection);
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49 vertexColor = Uniforms.baseColorFactor[materialIndex];
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50 colorTexCoord = texcoord_0;
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51 materialIndexOut = materialIndex;
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52 """,
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53 fragmentCode="""
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54 // vec4 col[4] = vec4[4](vec4(1, 0, 0, 1), vec4(0, 1, 0, 1), vec4(0, 0, 1, 1), vec4(1, 1, 1, 1));
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55 color = texture(baseColorTexture[materialIndexOut], colorTexCoord) * vertexColor;
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56 """
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57 )
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58 engine.setRenderer(engine.gpuDevice.simpleForwardRenderPass(vertexCode, fragmentCode, clearColor=newVec4f(0, 0, 0, 1)))
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59 for scene in scenes.mitems:
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60 engine.addScene(scene, vertexInput, samplers)
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61 scene.addShaderGlobal("projection", Unit4)
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62 scene.addShaderGlobal("view", Unit4)
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63 let baseColors = scene.materials.map(proc(i: Material): Vec4f = getValue[Vec4f](i[].constants["baseColorFactor"]))
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64 scene.addShaderGlobalArray("baseColorFactor", baseColors)
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65 var
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66 size = 1'f32
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67 elevation = 0'f32
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68 azimut = 0'f32
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69 currentScene = 0
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70
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71 while engine.updateInputs() == Running and not engine.keyIsDown(Escape):
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72 if engine.keyWasPressed(`1`):
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73 currentScene = 0
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74 elif engine.keyWasPressed(`2`):
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75 currentScene = 1
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76 elif engine.keyWasPressed(`3`):
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77 currentScene = 2
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78 elif engine.keyWasPressed(`4`):
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79 currentScene = 3
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80 elif engine.keyWasPressed(`5`):
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81 currentScene = 4
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82 elif engine.keyWasPressed(`6`):
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83 currentScene = 5
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84
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85 if engine.keyWasPressed(NumberRowExtra3):
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86 size = 0.3'f32
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87 elevation = 0'f32
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88 azimut = 0'f32
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89
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90 let ratio = engine.getWindow().size[0] / engine.getWindow().size[1]
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91 size *= 1'f32 + engine.mouseWheel() * 0.05
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92 azimut += engine.mouseMove().x / 180'f32
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93 elevation -= engine.mouseMove().y / 180'f32
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94 scenes[currentScene].setShaderGlobal("projection", ortho(-ratio, ratio, -1, 1, -1, 1))
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95 scenes[currentScene].setShaderGlobal(
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96 "view",
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97 scale3d(size, size, size) * rotate3d(elevation, newVec3f(1, 0, 0)) * rotate3d(azimut, Yf32)
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98 )
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99 engine.renderScene(scenes[currentScene])
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100 engine.destroy()
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101
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102 when isMainModule:
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103 main()