Mercurial > games > semicongine

annotate examples/E01_hello_triangle.nim @ 530:cfa230e1f3b9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fix: mouse coord, colors
author Sam <sam@basx.dev>
date Sun, 05 Feb 2023 00:46:40 +0700
parents eb92723db7b2
children 21c276c0a968
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
522
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
1 import std/times
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
2 import std/strutils
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
3 import std/enumerate
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
4
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
5 import semicongine
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
6
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
7 type
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
8 # define type of vertex
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
9 VertexDataA = object
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
10 position: PositionAttribute[Vec2]
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
11 color: ColorAttribute[Vec3]
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
12
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
13 var pipeline: RenderPipeline[VertexDataA, void]
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
14
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
15 proc globalUpdate(engine: var Engine, dt: float32) =
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
16 discard
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
17
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
18 # vertex data (types must match the above VertexAttributes)
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
19 const
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
20 triangle_pos = @[
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
21 Vec2([0.0'f32, -0.5'f32]),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
22 Vec2([0.5'f32, 0.5'f32]),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
23 Vec2([-0.5'f32, 0.5'f32]),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
24 ]
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
25 triangle_color = @[
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
26 Vec3([1.0'f32, 0.0'f32, 0.0'f32]),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
27 Vec3([0.0'f32, 1.0'f32, 0.0'f32]),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
28 Vec3([0.0'f32, 0.0'f32, 1.0'f32]),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
29 ]
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
30
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
31 when isMainModule:
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
32 var myengine = igniteEngine("Hello triangle")
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
33
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
34 # build a mesh
529
eb92723db7b2 fix: API changes
Sam <sam@basx.dev>
parents: 522
diff changeset
35 var trianglemesh = new Mesh[VertexDataA, uint16]
522
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
36 trianglemesh.vertexData = VertexDataA(
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
37 position: PositionAttribute[Vec2](data: triangle_pos),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
38 color: ColorAttribute[Vec3](data: triangle_color),
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
39 )
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
40 # build a single-object scene graph
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
41 var triangle = newThing("triangle", trianglemesh)
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
42
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
43 # upload data, prepare shaders, etc
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
44 const vertexShader = generateVertexShaderCode[VertexDataA, void]()
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
45 const fragmentShader = generateFragmentShaderCode[VertexDataA]()
529
eb92723db7b2 fix: API changes
Sam <sam@basx.dev>
parents: 522
diff changeset
46 pipeline = setupPipeline[VertexDataA, void, uint16](
522
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
47 myengine,
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
48 triangle,
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
49 vertexShader,
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
50 fragmentShader
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
51 )
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
52 # show something
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
53 myengine.run(pipeline, globalUpdate)
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
54 pipeline.trash()
f2c97bdbb0b3 did: rename and update older demos to work with new APIs
Sam <sam@basx.dev>
parents:
diff changeset
55 myengine.trash()