Mercurial > games > semicongine

annotate examples/hello_triangle.nim @ 480:14e5151f68d1

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did: introduce scene graph, meshs and generic vertex buffers
author Sam <sam@basx.dev>
date Mon, 09 Jan 2023 11:04:19 +0700
parents 04b8471bdab4
children 1670f8e70964
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480
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1 import zamikongine/engine
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2 import zamikongine/math/vector
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3 import zamikongine/vertex
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4 import zamikongine/mesh
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5 import zamikongine/thing
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6 import zamikongine/shader
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7
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8 type
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9 VertexDataA = object
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10 position11: VertexAttribute[Vec2[float32]]
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11 color22: VertexAttribute[Vec3[float32]]
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12
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13 when isMainModule:
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14 var myengine = igniteEngine()
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15 var mymesh1 = new Mesh[VertexDataA]
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16 mymesh1.vertexData = VertexDataA(
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17 position11: VertexAttribute[Vec2[float32]](
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18 data: @[
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19 Vec2([-0.5'f32, -0.5'f32]),
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20 Vec2([ 0.5'f32, 0.5'f32]),
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21 Vec2([-0.5'f32, 0.5'f32]),
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22 ]
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23 ),
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24 color22: VertexAttribute[Vec3[float32]](
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25 data: @[
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26 Vec3([1.0'f32, 1.0'f32, 0.0'f32]),
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27 Vec3([0.0'f32, 1.0'f32, 0.0'f32]),
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28 Vec3([0.0'f32, 1.0'f32, 1.0'f32]),
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29 ]
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30 )
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31 )
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32 var mymesh2 = new IndexedMesh[VertexDataA, uint16]
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33 mymesh2.vertexData = VertexDataA(
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34 position11: VertexAttribute[Vec2[float32]](
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35 data: @[
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36 Vec2([ 0.0'f32, -0.7'f32]),
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37 Vec2([ 0.6'f32, 0.1'f32]),
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38 Vec2([ 0.3'f32, 0.4'f32]),
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39 ]
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40 ),
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41 color22: VertexAttribute[Vec3[float32]](
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42 data: @[
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43 Vec3([1.0'f32, 1.0'f32, 0.0'f32]),
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44 Vec3([1.0'f32, 0.0'f32, 0.0'f32]),
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45 Vec3([0.0'f32, 1.0'f32, 1.0'f32]),
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46 ]
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47 )
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48 )
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49 mymesh2.indices = @[[0'u16, 1'u16, 2'u16]]
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50 var athing = new Thing
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51 athing.parts.add mymesh1
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52 var childthing = new Thing
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53 childthing.parts.add mymesh2
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54 athing.children.add childthing
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55
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56 setupPipeline[VertexDataA, uint16](
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57 myengine,
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58 athing,
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59 generateVertexShaderCode[VertexDataA]("main", "position11", "color22"),
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60 generateFragmentShaderCode[VertexDataA]("main"),
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61 )
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62 myengine.fullThrottle()
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63 myengine.trash()