Mercurial > games > semicongine

annotate examples/E01_hello_triangle.nim @ 309:81949dafd8f4

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fix: references dont need to be passed as "var", small error message improvment
author Sam <sam@basx.dev>
date Sat, 08 Jul 2023 21:06:26 +0700
parents da0bd61abe91
children b145a05c2459
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import ../src/semicongine
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3
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4 const
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5 vertexInput = @[
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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 vertexOutput = @[attr[Vec4f]("outcolor")]
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10 fragOutput = @[attr[Vec4f]("color")]
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11 vertexCode = compileGlslShader(
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12 stage=VK_SHADER_STAGE_VERTEX_BIT,
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13 inputs=vertexInput,
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14 outputs=vertexOutput,
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15 main="""
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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 )
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20 fragmentCode = compileGlslShader(
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21 stage=VK_SHADER_STAGE_FRAGMENT_BIT,
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22 inputs=vertexOutput,
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23 outputs=fragOutput,
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24 main="color = outcolor;"
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25 )
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26
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27 var
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28 triangle = newScene("scene", newEntity(
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29 "triangle",
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30 {"mesh": Component(newMesh(
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31 [newVec3f(-0.5, 0.5), newVec3f(0, -0.5), newVec3f(0.5, 0.5)],
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32 [newVec4f(1, 0, 0, 1), newVec4f(0, 1, 0, 1), newVec4f(0, 0, 1, 1)],
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33 ))}
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34 ))
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35 myengine = initEngine("Hello triangle")
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36 renderPass = myengine.gpuDevice.simpleForwardRenderPass(vertexCode, fragmentCode)
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37
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38 myengine.setRenderer(renderPass)
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39 myengine.addScene(triangle, vertexInput, @[], transformAttribute="")
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41 while myengine.updateInputs() == Running and not myengine.keyWasPressed(Escape):
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42 myengine.renderScene(triangle)
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44 myengine.destroy()