Mercurial > games > semicongine

annotate old_tests/test_mesh.nim @ 1329:ad09d41abd1e

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add: 2d-scaling for text
author sam <sam@basx.dev>
date Sat, 17 Aug 2024 16:09:15 +0700
parents 6360c8d17ce0
children
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1 import std/strformat
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2 import semicongine
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3
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4 const
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5 MeshMaterial* = MaterialType(
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6 name: "colored single texture material",
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7 vertexAttributes: {
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8 "position": Vec3F32,
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9 "texcoord_0": Vec2F32,
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10 }.toTable,
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11 attributes: {"baseTexture": TextureType, "color": Vec4F32}.toTable
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12 )
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13
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14 proc main() =
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15 var scenes = [
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16 Scene(name: "Donut", meshes: LoadMeshes("donut.glb", MeshMaterial)[0].toSeq),
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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 shaderConfiguration = CreateShaderConfiguration(
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22 name = "default shader",
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23 inputs = [
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24 Attr[Vec3f]("position", memoryPerformanceHint = PreferFastRead),
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25 Attr[uint16](MATERIALINDEX_ATTRIBUTE, memoryPerformanceHint = PreferFastRead, perInstance = true),
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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]("color", arrayCount = 4),
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39 ],
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40 samplers = [Attr[Texture]("baseTexture", 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.color[{MATERIALINDEX_ATTRIBUTE}];
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44 colorTexCoord = texcoord_0;
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45 materialIndexOut = {MATERIALINDEX_ATTRIBUTE};
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46 """,
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47 fragmentCode = "color = texture(baseTexture[materialIndexOut], colorTexCoord) * vertexColor;"
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48 )
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49 engine.InitRenderer({MeshMaterial: shaderConfiguration})
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50
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51 for scene in scenes.mitems:
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52 scene.AddShaderGlobal("projection", Unit4F32)
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53 scene.AddShaderGlobal("view", Unit4F32)
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54 engine.LoadScene(scene)
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55
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56 var
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57 size = 1'f32
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58 elevation = 0'f32
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59 azimut = 0'f32
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60 currentScene = 0
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61
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62 while engine.UpdateInputs() and not KeyIsDown(Escape):
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63 if KeyWasPressed(`1`):
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64 currentScene = 0
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65 elif KeyWasPressed(`2`):
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66 currentScene = 1
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67 elif KeyWasPressed(`3`):
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68 currentScene = 2
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69 elif KeyWasPressed(`4`):
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70 currentScene = 3
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71 elif KeyWasPressed(`5`):
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72 currentScene = 4
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73 elif KeyWasPressed(`6`):
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74 currentScene = 5
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75
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76 if KeyWasPressed(NumberRowExtra3):
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77 size = 0.3'f32
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78 elevation = 0'f32
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79 azimut = 0'f32
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80
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81 let ratio = engine.GetWindow().Size[0] / engine.GetWindow().Size[1]
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82 size *= 1'f32 + MouseWheel() * 0.05
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83 azimut += MouseMove().x / 180'f32
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84 elevation -= MouseMove().y / 180'f32
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85 scenes[currentScene].SetShaderGlobal("projection", Perspective(PI / 2, ratio, -0.5, 1))
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86 scenes[currentScene].SetShaderGlobal(
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87 "view",
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88 Scale(size, size, size) * Rotate(elevation, NewVec3f(1, 0, 0)) * Rotate(azimut, Yf32)
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89 )
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90 engine.RenderScene(scenes[currentScene])
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91 engine.Destroy()
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93 when isMainModule:
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94 main()