39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
draw_sky :: (cam: *Camera, worldConfig: *World_Config = null) {
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mvp := create_viewproj(cam);
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vs_params : Sky_Vs_Params;
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world_conf : Sky_World_Config;
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wc : *World_Config = ifx worldConfig == null then *(World_Config.{}) else worldConfig;
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world_config_to_shader_type(wc, *world_conf);
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vs_params.mvp = mvp.floats;
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sg_apply_pipeline(gPipelines.sky.pipeline);
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sg_apply_bindings(*gPipelines.sky.bind);
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sg_apply_uniforms(UB_sky_vs_params, *(sg_range.{ ptr = *vs_params, size = size_of(type_of(vs_params)) }));
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sg_apply_uniforms(UB_sky_world_config, *(sg_range.{ptr = *world_conf, size = size_of(type_of(world_conf))}));
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sg_draw(0, 36, 1);
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}
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create_shadow_viewproj :: (cam: *Camera, conf: *World_Config) -> Matrix4 {
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up: Vector3 = .{0, 1, 0};
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targetToPos := conf.sunPosition;
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A := normalize(targetToPos);
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B := normalize(cross(up, A));
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C := cross(A, B);
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sunCameraPosition := cam.target + 20*A;
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view := Matrix4.{
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B.x, C.x, A.x, 0,
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B.y, C.y, A.y, 0,
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B.z, C.z, A.z, 0,
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-dot(B, sunCameraPosition), -dot(C, sunCameraPosition), -dot(A, sunCameraPosition), 1
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};
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top := 10.0; right := 10.0;
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proj := orthographic_projection_matrix(-right, right, -top, top, 5, 100, true);
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return view * proj;
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}
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