From 62516df757401ad5280a1384bd6d341aac8ac1df Mon Sep 17 00:00:00 2001 From: clayjohn Date: Fri, 18 Oct 2024 11:55:00 -0700 Subject: [PATCH] Precompute projection matrices when rendering 2D shadows --- drivers/gles3/rasterizer_canvas_gles3.cpp | 49 ++++++++++------- .../renderer_rd/renderer_canvas_render_rd.cpp | 53 +++++++++++-------- 2 files changed, 60 insertions(+), 42 deletions(-) diff --git a/drivers/gles3/rasterizer_canvas_gles3.cpp b/drivers/gles3/rasterizer_canvas_gles3.cpp index 3c959f01438..0138f99d508 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; } + 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; + + 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)), + + 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; - { - 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; - - projection.set_frustum(xmin, xmax, ymin, ymax, nearp, farp); - } - - 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_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); diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp index 979f590c4c0..9aa2ae54328 100644 --- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp +++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp @@ -993,36 +993,43 @@ void RendererCanvasRenderRD::light_update_shadow(RID p_rid, int p_shadow_index, Vector cc; cc.push_back(Color(p_far, p_far, p_far, 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; + + 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)), + + 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++) { - //make sure it remains orthogonal, makes easy to read angle later - - //light.basis.scale(Vector3(to_light.elements[0].length(),to_light.elements[1].length(),1)); - Rect2i rect((state.shadow_texture_size / 4) * i, p_shadow_index * 2, (state.shadow_texture_size / 4), 2); RD::DrawListID draw_list = RD::get_singleton()->draw_list_begin(state.shadow_fb, RD::INITIAL_ACTION_CLEAR, RD::FINAL_ACTION_STORE, RD::INITIAL_ACTION_CLEAR, RD::FINAL_ACTION_DISCARD, cc, 1.0, 0, rect); - 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; - - projection.set_frustum(xmin, xmax, ymin, ymax, nearp, farp); - } - - 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_target, Vector3(0, 0, -1)).affine_inverse()); - ShadowRenderPushConstant push_constant; for (int y = 0; y < 4; y++) { for (int x = 0; x < 4; x++) { - push_constant.projection[y * 4 + x] = projection.columns[y][x]; + push_constant.projection[y * 4 + x] = projections[i].columns[y][x]; } } static const Vector2 directions[4] = { Vector2(1, 0), Vector2(0, 1), Vector2(-1, 0), Vector2(0, -1) };