Mercurial > games > semicongine

annotate examples/E01_hello_triangle.nim @ 785:1880ab140165

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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 754835bf175e
children 8084252b807a
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1 import ../src/semicongine
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4 const
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5 inputs = @[
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6 attr[Vec3f]("position"),
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7 attr[Vec4f]("color"),
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8 ]
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9 intermediate = @[attr[Vec4f]("outcolor")]
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10 outputs = @[attr[Vec4f]("color")]
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11 (vertexCode, fragmentCode) = compileVertexFragmentShaderSet(
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12 inputs=inputs,
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13 intermediate=intermediate,
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14 outputs=outputs,
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15 vertexCode="""
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16 gl_Position = vec4(position, 1.0);
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17 outcolor = color;
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18 """,
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19 fragmentCode="color = outcolor;",
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20 )
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22 var
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23 triangle = newScene("scene", newEntity(
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24 "triangle",
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25 {"mesh": Component(newMesh(
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26 [newVec3f(-0.5, 0.5), newVec3f(0, -0.5), newVec3f(0.5, 0.5)],
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27 [newVec4f(1, 0, 0, 1), newVec4f(0, 1, 0, 1), newVec4f(0, 0, 1, 1)],
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28 ))}
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29 ))
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30 myengine = initEngine("Hello triangle")
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31 renderPass = myengine.gpuDevice.simpleForwardRenderPass(vertexCode, fragmentCode)
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33 myengine.setRenderer(renderPass)
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34 myengine.addScene(triangle, inputs, @[], transformAttribute="")
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36 while myengine.updateInputs() == Running and not myengine.keyWasPressed(Escape):
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37 myengine.renderScene(triangle)
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39 myengine.destroy()