Mercurial > games > semicongine

annotate examples/E01_hello_triangle.nim @ 362:3eccdbf32c53

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add: support inverse matrix and normalized mouse position
author Sam <sam@basx.dev>
date Fri, 29 Sep 2023 19:30:07 +0700
parents 887ddc8d45fd
children c66503386e8b
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1 import std/tables
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2
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3 import ../src/semicongine
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4
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5 # shader setup
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6 const
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7 shaderConfiguration = createShaderConfiguration(
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8 inputs=[
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9 attr[Vec3f]("position"),
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10 attr[Vec4f]("color"),
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11 ],
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12 intermediates=[attr[Vec4f]("outcolor")],
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13 outputs=[attr[Vec4f]("color")],
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14 vertexCode="gl_Position = vec4(position, 1.0); outcolor = color;",
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15 fragmentCode="color = outcolor;",
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16 )
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18 # scene setup
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19 var
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20 triangle = Scene(name: "scene",
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21 meshes: @[newMesh(
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22 [newVec3f(-0.5, 0.5), newVec3f(0, -0.5), newVec3f(0.5, 0.5)],
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23 [newVec4f(1, 0, 0, 1), newVec4f(0, 1, 0, 1), newVec4f(0, 0, 1, 1)],
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24 material=Material(name: "default")
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25 )]
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26 )
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27 myengine = initEngine("Hello triangle")
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29 myengine.initRenderer({"default": shaderConfiguration}.toTable)
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30 myengine.addScene(triangle)
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32 while myengine.updateInputs() == Running and not myengine.keyWasPressed(Escape):
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33 myengine.renderScene(triangle)
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35 myengine.destroy()