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| author | Thaddeus Crews <repiteo@outlook.com> | 2024-11-10 12:12:14 -0600 |
|---|---|---|
| committer | Thaddeus Crews <repiteo@outlook.com> | 2024-11-10 12:12:14 -0600 |
| commit | 2b02143d35ed6bf271cb30ae70a927e76b9f5088 (patch) | |
| tree | 40be68334b4233a29564162a448848f2b8fd523b /drivers | |
| parent | e65a23762b36b564eb94672031f37fdadba72333 (diff) | |
| parent | 62516df757401ad5280a1384bd6d341aac8ac1df (diff) | |
| download | redot-engine-2b02143d35ed6bf271cb30ae70a927e76b9f5088.tar.gz | |
Merge pull request #98307 from clayjohn/Light2D-shadow-projection
Precompute projection matrices when rendering 2D shadows
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gles3/rasterizer_canvas_gles3.cpp | 45 |
1 files changed, 28 insertions, 17 deletions
diff --git a/drivers/gles3/rasterizer_canvas_gles3.cpp b/drivers/gles3/rasterizer_canvas_gles3.cpp index 3c959f0143..0138f99d50 100644 --- a/drivers/gles3/rasterizer_canvas_gles3.cpp +++ b/drivers/gles3/rasterizer_canvas_gles3.cpp @@ -1654,28 +1654,39 @@ void RasterizerCanvasGLES3::light_update_shadow(RID p_rid, int p_shadow_index, c return; } - for (int i = 0; i < 4; i++) { - glViewport((state.shadow_texture_size / 4) * i, p_shadow_index * 2, (state.shadow_texture_size / 4), 2); + Projection projection; + { + real_t fov = 90; + real_t nearp = p_near; + real_t farp = p_far; + real_t aspect = 1.0; - Projection projection; - { - real_t fov = 90; - real_t nearp = p_near; - real_t farp = p_far; - real_t aspect = 1.0; + real_t ymax = nearp * Math::tan(Math::deg_to_rad(fov * 0.5)); + real_t ymin = -ymax; + real_t xmin = ymin * aspect; + real_t xmax = ymax * aspect; - real_t ymax = nearp * Math::tan(Math::deg_to_rad(fov * 0.5)); - real_t ymin = -ymax; - real_t xmin = ymin * aspect; - real_t xmax = ymax * aspect; + projection.set_frustum(xmin, xmax, ymin, ymax, nearp, farp); + } - projection.set_frustum(xmin, xmax, ymin, ymax, nearp, farp); - } + // Precomputed: + // Vector3 cam_target = Basis::from_euler(Vector3(0, 0, Math_TAU * ((i + 3) / 4.0))).xform(Vector3(0, 1, 0)); + // projection = projection * Projection(Transform3D().looking_at(cam_targets[i], Vector3(0, 0, -1)).affine_inverse()); + const Projection projections[4] = { + projection * Projection(Vector4(0, 0, -1, 0), Vector4(1, 0, 0, 0), Vector4(0, -1, 0, 0), Vector4(0, 0, 0, 1)), - Vector3 cam_target = Basis::from_euler(Vector3(0, 0, Math_TAU * ((i + 3) / 4.0))).xform(Vector3(0, 1, 0)); + projection * Projection(Vector4(-1, 0, 0, 0), Vector4(0, 0, -1, 0), Vector4(0, -1, 0, 0), Vector4(0, 0, 0, 1)), + + projection * Projection(Vector4(0, 0, 1, 0), Vector4(-1, 0, 0, 0), Vector4(0, -1, 0, 0), Vector4(0, 0, 0, 1)), + + projection * Projection(Vector4(1, 0, 0, 0), Vector4(0, 0, 1, 0), Vector4(0, -1, 0, 0), Vector4(0, 0, 0, 1)) + + }; + + for (int i = 0; i < 4; i++) { + glViewport((state.shadow_texture_size / 4) * i, p_shadow_index * 2, (state.shadow_texture_size / 4), 2); - projection = projection * Projection(Transform3D().looking_at(cam_target, Vector3(0, 0, -1)).affine_inverse()); - shadow_render.shader.version_set_uniform(CanvasOcclusionShaderGLES3::PROJECTION, projection, shadow_render.shader_version, variant); + shadow_render.shader.version_set_uniform(CanvasOcclusionShaderGLES3::PROJECTION, projections[i], shadow_render.shader_version, variant); static const Vector2 directions[4] = { Vector2(1, 0), Vector2(0, 1), Vector2(-1, 0), Vector2(0, -1) }; shadow_render.shader.version_set_uniform(CanvasOcclusionShaderGLES3::DIRECTION, directions[i].x, directions[i].y, shadow_render.shader_version, variant); |