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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| //------------------------------------------------------------------------------ | ||
| // sgl_points.d | ||
| // | ||
| // Test sokol-gl point rendering. | ||
| // | ||
| // (port of this C sample: https://floooh.github.io/sokol-html5/sgl-points-sapp.html) | ||
| //------------------------------------------------------------------------------ | ||
|
|
||
| module examples.sgl_points; | ||
|
|
||
| import sg = sokol.gfx; | ||
| import sgapp = sokol.glue; | ||
| import sapp = sokol.app; | ||
| import slog = sokol.log; | ||
| import sgl = sokol.gl; | ||
| import handmade.math : sin, cos, floor; | ||
|
|
||
| extern (C): | ||
| @safe: | ||
|
|
||
| struct RGB | ||
| { | ||
| float r = 0.0, g = 0.0, b = 0.0; | ||
| } | ||
|
|
||
| struct State | ||
| { | ||
| static sg.PassAction pass_action = { | ||
| colors: [ | ||
| { | ||
| load_action: sg.LoadAction.Clear, | ||
| clear_value: {r: 0.0, g: 0.0, b: 0.0, a: 1.0}, | ||
| } | ||
| ] | ||
| }; | ||
| } | ||
|
|
||
| immutable float[3][16] pallete = [ | ||
| [0.957, 0.263, 0.212], | ||
| [0.914, 0.118, 0.388], | ||
| [0.612, 0.153, 0.690], | ||
| [0.404, 0.227, 0.718], | ||
| [0.247, 0.318, 0.710], | ||
| [0.129, 0.588, 0.953], | ||
| [0.012, 0.663, 0.957], | ||
| [0.000, 0.737, 0.831], | ||
| [0.000, 0.588, 0.533], | ||
| [0.298, 0.686, 0.314], | ||
| [0.545, 0.765, 0.290], | ||
| [0.804, 0.863, 0.224], | ||
| [1.000, 0.922, 0.231], | ||
| [1.000, 0.757, 0.027], | ||
| [1.000, 0.596, 0.000], | ||
| [1.000, 0.341, 0.133], | ||
| ]; | ||
|
|
||
| void init() | ||
| { | ||
| sg.Desc gfxd = {context: sgapp.context(), | ||
| logger: {func: &slog.func}}; | ||
| sg.setup(gfxd); | ||
|
|
||
| sgl.Desc gld = {logger: {func: &slog.func}}; | ||
| sgl.setup(gld); | ||
| } | ||
|
|
||
| void frame() | ||
| { | ||
| immutable float angle = sapp.frameCount() % 360.0; | ||
| State state; | ||
|
|
||
| sgl.defaults(); | ||
| sgl.beginPoints(); | ||
| float psize = 5.0; | ||
| foreach (i; 0 .. 360) | ||
| { | ||
| auto a = sgl.asRadians(angle + i); | ||
| auto color = computeColor(((sapp.frameCount() + i) % 300) / 300.0); | ||
| auto r = sin(a * 4.0); | ||
| auto s = sin(a); | ||
| auto c = cos(a); | ||
| auto x = s * r; | ||
| auto y = c * r; | ||
| sgl.c3f(color.r, color.g, color.b); | ||
| sgl.pointSize(psize); | ||
| sgl.v2f(x, y); | ||
| psize *= 1.005; | ||
| } | ||
| sgl.end(); | ||
|
|
||
| sg.beginDefaultPass(state.pass_action, sapp.width, sapp.height); | ||
| sgl.draw(); | ||
| sg.endPass(); | ||
| sg.commit(); | ||
| } | ||
|
|
||
| void cleanup() | ||
| { | ||
| sgl.shutdown(); | ||
| sg.shutdown(); | ||
| } | ||
|
|
||
| void main() | ||
| { | ||
| sapp.Desc runner = { | ||
| window_title: "sgl-points.d", | ||
| init_cb: &init, | ||
| frame_cb: &frame, | ||
| cleanup_cb: &cleanup, | ||
| width: 512, | ||
| height: 512, | ||
| logger: {func: &slog.func}, | ||
| icon: {sokol_default: true} | ||
| }; | ||
| sapp.run(runner); | ||
| } | ||
|
|
||
| RGB computeColor(float t) | ||
| { | ||
| const(size_t) idx0 = cast(size_t)(t * 16) % 16; | ||
| const(size_t) idx1 = cast(size_t)(idx0 + 1) % 16; | ||
| const l = (t * 16) - floor(t * 16); | ||
| const c0 = pallete[idx0]; | ||
| const c1 = pallete[idx1]; | ||
| RGB rgb = { | ||
| r: (c0[0] * (1 - l)) + (c1[0] * l), | ||
| g: (c0[1] * (1 - l)) + (c1[1] * l), | ||
| b: (c0[2] * (1 - l)) + (c1[2] * l), | ||
| }; | ||
| return rgb; | ||
| } |
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