Mercurial > games > semicongine

annotate examples/hello_triangle.nim @ 24:71bbe11d8de8

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
did: change shader compilation to run during program compilation, maybe add dynamic version later
author Sam <sam@basx.dev>
date Wed, 11 Jan 2023 11:15:02 +0700
parents 316923e9247c
children b1b05d4efb52
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
19
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
1 import zamikongine/engine
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
2 import zamikongine/math/vector
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
3 import zamikongine/vertex
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
4 import zamikongine/mesh
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
5 import zamikongine/thing
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
6 import zamikongine/shader
0
5daf3f236d87 add: initial version
Sam <sam@basx.dev>
parents:
diff changeset
7
19
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
8 type
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
9 # define type of vertex
19
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
10 VertexDataA = object
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
11 position: VertexAttribute[Vec2[float32]]
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
12 color: VertexAttribute[Vec3[float32]]
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
13
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
14 # vertex data (types must match the above VertexAttributes)
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
15 const
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
16 triangle_pos = @[
24
71bbe11d8de8 did: change shader compilation to run during program compilation, maybe add dynamic version later
Sam <sam@basx.dev>
parents: 21
diff changeset
17 Vec2([ 0.0'f32, -0.5'f32]),
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
18 Vec2([ 0.5'f32, 0.5'f32]),
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
19 Vec2([-0.5'f32, 0.5'f32]),
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
20 ]
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
21 triangle_color = @[
24
71bbe11d8de8 did: change shader compilation to run during program compilation, maybe add dynamic version later
Sam <sam@basx.dev>
parents: 21
diff changeset
22 Vec3([1.0'f32, 0.0'f32, 0.0'f32]),
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
23 Vec3([0.0'f32, 1.0'f32, 0.0'f32]),
24
71bbe11d8de8 did: change shader compilation to run during program compilation, maybe add dynamic version later
Sam <sam@basx.dev>
parents: 21
diff changeset
24 Vec3([0.0'f32, 0.0'f32, 1.0'f32]),
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
25 ]
0
5daf3f236d87 add: initial version
Sam <sam@basx.dev>
parents:
diff changeset
26
5daf3f236d87 add: initial version
Sam <sam@basx.dev>
parents:
diff changeset
27 when isMainModule:
2
213fdf8d31dd did: hello world triangle, a bit of code organization
Sam <sam@basx.dev>
parents: 0
diff changeset
28 var myengine = igniteEngine()
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
29
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
30 # build a mesh
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
31 var trianglemesh = new Mesh[VertexDataA]
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
32 trianglemesh.vertexData = VertexDataA(
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
33 position: VertexAttribute[Vec2[float32]](data: triangle_pos),
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
34 color: VertexAttribute[Vec3[float32]](data: triangle_color),
19
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
35 )
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
36 # build a single-object scene graph
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
37 var triangle = new Thing
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
38 # add the triangle mesh to the object
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
39 triangle.parts.add trianglemesh
19
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
40
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
41 # upload data, prepare shaders, etc
19
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
42 setupPipeline[VertexDataA, uint16](
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
43 myengine,
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
44 triangle,
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
45 generateVertexShaderCode[VertexDataA]("main", "position", "color"),
19
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
46 generateFragmentShaderCode[VertexDataA]("main"),
b55d6ecde79d did: introduce scene graph, meshs and generic vertex buffers
Sam <sam@basx.dev>
parents: 12
diff changeset
47 )
21
316923e9247c add: clean examples, update build configs
Sam <sam@basx.dev>
parents: 19
diff changeset
48 # show something
0
5daf3f236d87 add: initial version
Sam <sam@basx.dev>
parents:
diff changeset
49 myengine.fullThrottle()
5daf3f236d87 add: initial version
Sam <sam@basx.dev>
parents:
diff changeset
50 myengine.trash()