Mercurial > games > semicongine

annotate tests/test_mesh.nim @ 730:88ab3e6dcaa0

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add: simpler shader construction
author Sam <sam@basx.dev>
date Sun, 28 May 2023 18:36:11 +0700
parents 7b72da29ad8d
children da0bd61abe91
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1 import semicongine
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2
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3 proc main() =
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4 var ent1 = newEntity("hoho", rect())
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5 var ent2 = newEntity("hehe", ent1)
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6 var myScene = newScene("hi", ent2)
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7 myScene.root.transform = translate3d(0.2'f32, 0'f32, 0'f32)
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8 myScene.root.children[0].transform = translate3d(0'f32, 0.2'f32, 0'f32)
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9 var scenes = [
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10 # loadScene("default_cube.glb", "1"),
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11 # loadScene("default_cube1.glb", "3"),
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12 # loadScene("default_cube2.glb", "4"),
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13 # loadScene("flat.glb", "5"),
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14 loadScene("tutorialk-donat.glb", "6"),
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15 # myScene,
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16 # loadScene("personv3.glb", "2"),
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17 ]
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18
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19 var engine = initEngine("Test meshes")
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20 const
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21 vertexInput = @[
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22 attr[Vec3f]("position", memoryPerformanceHint=PreferFastRead),
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23 attr[uint8]("material", memoryPerformanceHint=PreferFastRead),
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24 attr[Vec2f]("texcoord_0", memoryPerformanceHint=PreferFastRead),
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25 attr[Mat4]("transform", memoryPerformanceHint=PreferFastWrite, perInstance=true),
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26 ]
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27 intermediate = @[
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28 attr[Vec4f]("vertexColor"),
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29 attr[Vec2f]("colorTexCoord"),
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30 attr[uint8]("materialId", noInterpolation=true)
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31 ]
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32 fragOutput = @[attr[Vec4f]("color")]
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33 uniforms = @[
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34 attr[Mat4]("projection"),
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35 attr[Mat4]("view"),
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36 attr[Vec4f]("baseColorFactor", arrayCount=4),
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37 ]
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38 samplers = @[attr[Sampler2DType]("baseColorTexture", arrayCount=4)]
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39 (vertexCode, fragmentCode) = compileVertexFragmentShaderSet(
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40 inputs=vertexInput,
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41 intermediate=intermediate,
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42 outputs=fragOutput,
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43 uniforms=uniforms,
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44 samplers=samplers,
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45 vertexCode="""
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46 gl_Position = vec4(position, 1.0) * (transform * Uniforms.view * Uniforms.projection);
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47 vertexColor = Uniforms.baseColorFactor[material];
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48 colorTexCoord = texcoord_0;
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49 materialId = material;
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50 """,
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51 fragmentCode="""
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52 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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53 color = texture(baseColorTexture[materialId], colorTexCoord) * vertexColor;
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54 """
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55 )
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56 engine.setRenderer(engine.gpuDevice.simpleForwardRenderPass(vertexCode, fragmentCode, clearColor=newVec4f(0, 0, 0, 1)))
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57 for scene in scenes.mitems:
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58 engine.addScene(scene, vertexInput, samplers, transformAttribute="transform")
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59 scene.addShaderGlobal("projection", Unit4)
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60 scene.addShaderGlobal("view", Unit4)
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61 var
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62 size = 1'f32
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63 elevation = 0'f32
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64 azimut = 0'f32
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65 currentScene = 0
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66
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67 while engine.updateInputs() == Running and not engine.keyIsDown(Escape):
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68 if engine.keyWasPressed(`1`):
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69 currentScene = 0
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70 elif engine.keyWasPressed(`2`):
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71 currentScene = 1
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72 elif engine.keyWasPressed(`3`):
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73 currentScene = 2
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74 elif engine.keyWasPressed(`4`):
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75 currentScene = 3
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76 elif engine.keyWasPressed(`5`):
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77 currentScene = 4
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78 elif engine.keyWasPressed(`6`):
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79 currentScene = 5
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80
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81 if engine.keyWasPressed(NumberRowExtra3):
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82 size = 0.3'f32
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83 elevation = 0'f32
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84 azimut = 0'f32
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85
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86 let ratio = engine.getWindow().size[0] / engine.getWindow().size[1]
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87 size *= 1'f32 + engine.mouseWheel() * 0.05
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88 azimut += engine.mouseMove().x / 180'f32
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89 elevation -= engine.mouseMove().y / 180'f32
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90 scenes[currentScene].setShaderGlobal("projection", ortho(-ratio, ratio, -1, 1, -1, 1))
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91 scenes[currentScene].setShaderGlobal(
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92 "view",
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93 scale3d(size, size, size) * rotate3d(elevation, newVec3f(1, 0, 0)) * rotate3d(azimut, Yf32)
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94 )
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95 engine.renderScene(scenes[currentScene])
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96 engine.destroy()
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97
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98 when isMainModule:
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99 main()