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comparison examples/E04_input.nim @ 61:0f04ba283558

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did: rename and update older demos to work with new APIs
author Sam <sam@basx.dev>
date Tue, 24 Jan 2023 10:22:38 +0700
parents examples/input.nim@c57285d292b6
children e766d138cc5d
comparison
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60:c57285d292b6 61:0f04ba283558
1 import std/strutils
2 import std/times
3
4 import semicongine
5
6 type
7 # define type of vertex
8 VertexDataA = object
9 position: PositionAttribute[Vec2]
10 color: ColorAttribute[Vec3]
11 transform: ModelTransformAttribute
12 Uniforms = object
13 projection: Descriptor[Mat44]
14 cursor: Descriptor[Vec2]
15
16 var
17 pipeline: RenderPipeline[VertexDataA, Uniforms]
18 uniforms: Uniforms
19 scene: Thing
20 time: float
21
22
23 proc globalUpdate(engine: var Engine, dt: float32) =
24 time += dt
25 uniforms.cursor.value = engine.input.mousePos
26 uniforms.projection.value = ortho[float32](
27 0'f32, float32(engine.vulkan.frameSize.x),
28 0'f32, float32(engine.vulkan.frameSize.y),
29 0'f32, 1'f32,
30 )
31 engine.vulkan.device.updateUniformData(pipeline, uniforms)
32
33 let cursor = firstPartWithName[Mesh[VertexDataA]](scene, "cursor")
34 if cursor != nil:
35 for c in cursor.vertexData.color.data.mitems:
36 c[1] = (sin(time * 8) * 0.5 + 0.5) * 0.2
37 c[2] = (sin(time * 8) * 0.5 + 0.5) * 0.2
38 engine.vulkan.device.updateVertexData(cursor.vertexData.color)
39
40 var trans = translate3d(engine.input.mousePos.x, engine.input.mousePos.y, 0'f32)
41 # cursor.vertexData.transform.data = @[trans.transposed()]
42 engine.vulkan.device.updateVertexData(cursor.vertexData.transform)
43
44
45 const
46 shape = @[
47 Vec2([ - 1'f32, - 1'f32]),
48 Vec2([1'f32, - 1'f32]),
49 Vec2([-0.3'f32, -0.3'f32]),
50 Vec2([-0.3'f32, -0.3'f32]),
51 Vec2([ - 1'f32, 1'f32]),
52 Vec2([ - 1'f32, - 1'f32]),
53 ]
54 colors = @[
55 Vec3([1'f32, 0'f32, 0'f32]),
56 Vec3([1'f32, 0'f32, 0'f32]),
57 Vec3([1'f32, 0'f32, 0'f32]),
58 Vec3([0.8'f32, 0'f32, 0'f32]),
59 Vec3([0.8'f32, 0'f32, 0'f32]),
60 Vec3([0.8'f32, 0'f32, 0'f32]),
61 ]
62
63 when isMainModule:
64 var myengine = igniteEngine("Input")
65
66 var cursormesh = new Mesh[VertexDataA]
67 cursormesh.vertexData = VertexDataA(
68 position: PositionAttribute[Vec2](data: shape, useOnDeviceMemory: true),
69 color: ColorAttribute[Vec3](data: colors),
70 transform: ModelTransformAttribute(data: @[Unit44]),
71 )
72 # transform the cursor a bit to make it look nice
73 for i in 0 ..< cursormesh.vertexData.position.data.len:
74 let cursorscale = (
75 scale2d(20'f32, 20'f32) *
76 translate2d(1'f32, 1'f32) *
77 rotate2d(-float32(PI) / 4'f32) *
78 scale2d(0.5'f32, 1'f32) *
79 rotate2d(float32(PI) / 4'f32)
80 )
81 let pos = Vec3([cursormesh.vertexData.position.data[i][0],
82 cursormesh.vertexData.position.data[i][1], 1'f32])
83 cursormesh.vertexData.position.data[i] = (cursorscale * pos).xy
84
85 var boxmesh = new Mesh[VertexDataA]
86 boxmesh.vertexData = VertexDataA(
87 position: PositionAttribute[Vec2](data: shape),
88 color: ColorAttribute[Vec3](data: colors),
89 transform: ModelTransformAttribute(data: @[Unit44]),
90 )
91 for i in 0 ..< boxmesh.vertexData.position.data.len:
92 let boxscale = translate2d(100'f32, 100'f32) * scale2d(100'f32, 100'f32)
93 let pos = Vec3([boxmesh.vertexData.position.data[i][0],
94 boxmesh.vertexData.position.data[i][1], 1'f32])
95 boxmesh.vertexData.position.data[i] = (boxscale * pos).xy
96
97 scene = newThing("scene")
98 scene.add newThing("cursor", cursormesh)
99 scene.add newThing("a box", boxmesh, newTransform(Unit44), newTransform(
100 translate3d(1'f32, 0'f32, 0'f32)))
101 scene.add newTransform(scale3d(1.5'f32, 1.5'f32, 1.5'f32))
102
103 # upload data, prepare shaders, etc
104 const vertexShader = generateVertexShaderCode[VertexDataA, Uniforms]("""
105 out_position = uniforms.projection * transform * vec4(position, 0, 1);
106 """)
107 const fragmentShader = generateFragmentShaderCode[VertexDataA]()
108 pipeline = setupPipeline[VertexDataA, Uniforms, uint16](
109 myengine,
110 scene,
111 vertexShader,
112 fragmentShader
113 )
114 # show something
115 myengine.run(pipeline, globalUpdate)
116 pipeline.trash()
117 myengine.trash()