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annotate tests/test_mesh.nim @ 333:27aaf43e18b4

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fix: material handling, gltf loading, loader example
author Sam <sam@basx.dev>
date Mon, 04 Sep 2023 00:31:17 +0700
parents e656c0aad093
children b83b3a1ccb05
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1 import std/algorithm
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2 import std/sequtils
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3 import std/tables
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4 import semicongine
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5
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6 proc main() =
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7 # var myScene = Scene(name: "hi", meshes: @[rect()])
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8 # myScene.meshes[0].transform = translate3d(0.2'f32, 0'f32, 0'f32)
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9 # myScene.root[0].transform = translate3d(0'f32, 0.2'f32, 0'f32)
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10 var scenes = [
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11 # loadScene("default_cube.glb", "1"),
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12 # loadScene("default_cube1.glb", "3"),
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13 # loadScene("default_cube2.glb", "4"),
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14 # loadScene("flat.glb", "5"),
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15 Scene(name: "Donut", meshes: loadMeshes("tutorialk-donat.glb")[0].toSeq),
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16 # myScene,
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17 # loadScene("personv3.glb", "2"),
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18 ]
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19
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20 var engine = initEngine("Test meshes")
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21 const
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22 shaderConfiguration = createShaderConfiguration(
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23 inputs=[
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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 intermediates=[
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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 outputs=[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[Texture]("baseColorTexture", arrayCount=4)],
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41 vertexCode="""
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42 gl_Position = vec4(position, 1.0) * (transform * Uniforms.view * Uniforms.projection);
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43 vertexColor = Uniforms.baseColorFactor[materialIndex];
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44 colorTexCoord = texcoord_0;
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45 materialIndexOut = materialIndex;
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46 """,
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47 fragmentCode="color = texture(baseColorTexture[materialIndexOut], colorTexCoord) * vertexColor;"
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48 )
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49 engine.initRenderer({
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50 "Material": shaderConfiguration,
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51 "Material.001": shaderConfiguration,
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52 "Material.002": shaderConfiguration,
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53 "Material.004": shaderConfiguration,
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54 }.toTable)
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55
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56 for scene in scenes.mitems:
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57 scene.addShaderGlobal("projection", Unit4F32)
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58 scene.addShaderGlobal("view", Unit4F32)
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59 var materials: Table[uint16, Material]
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60 for mesh in scene.meshes:
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61 if not materials.contains(mesh.material.index):
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62 materials[mesh.material.index] = mesh.material
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63 let baseColors = sortedByIt(values(materials).toSeq, it.index).mapIt(getValue[Vec4f](it.constants["baseColorFactor"], 0))
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64 let baseTextures = sortedByIt(values(materials).toSeq, it.index).mapIt(it.textures["baseColorTexture"])
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65 for t in baseTextures:
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66 echo "- ", t
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67 scene.addShaderGlobalArray("baseColorFactor", baseColors)
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68 scene.addShaderGlobalArray("baseColorTexture", baseTextures)
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69 engine.addScene(scene)
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70
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71 var
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72 size = 1'f32
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73 elevation = 0'f32
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74 azimut = 0'f32
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75 currentScene = 0
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76
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77 while engine.updateInputs() == Running and not engine.keyIsDown(Escape):
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78 if engine.keyWasPressed(`1`):
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79 currentScene = 0
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80 elif engine.keyWasPressed(`2`):
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81 currentScene = 1
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82 elif engine.keyWasPressed(`3`):
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83 currentScene = 2
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84 elif engine.keyWasPressed(`4`):
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85 currentScene = 3
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86 elif engine.keyWasPressed(`5`):
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87 currentScene = 4
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88 elif engine.keyWasPressed(`6`):
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89 currentScene = 5
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90
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91 if engine.keyWasPressed(NumberRowExtra3):
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92 size = 0.3'f32
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93 elevation = 0'f32
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94 azimut = 0'f32
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95
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96 let ratio = engine.getWindow().size[0] / engine.getWindow().size[1]
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97 size *= 1'f32 + engine.mouseWheel() * 0.05
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98 azimut += engine.mouseMove().x / 180'f32
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99 elevation -= engine.mouseMove().y / 180'f32
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100 scenes[currentScene].setShaderGlobal("projection", ortho(-ratio, ratio, -1, 1, -1, 1))
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101 scenes[currentScene].setShaderGlobal(
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102 "view",
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103 scale(size, size, size) * rotate(elevation, newVec3f(1, 0, 0)) * rotate(azimut, Yf32)
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104 )
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105 engine.renderScene(scenes[currentScene])
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106 engine.destroy()
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108 when isMainModule:
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109 main()