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Scene picking, shadow mapping adjustments

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This commit is contained in:
Daniel Bross
2024-10-17 23:54:44 +02:00
parent 221be140bf
commit 8ee000ab74
6 changed files with 94 additions and 70 deletions
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18
renderer/engine_buffers.jai
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@@ -7,7 +7,6 @@ calc_tight_light_projection :: (camera: Camera, light_direction: Vector3) -> Mat
inv_camera_view := inverse(camera.view_matrix);
view_frustum_in_world_space := transform(frustum, inv_camera_view);
// Transform world space camera frustum to light space (with origin in 0,0,0)
light_view := look_at_lh(.{0,0,0}, light_direction, .{0,1,0});
light_space_frustum := transform(view_frustum_in_world_space, light_view);
@@ -23,7 +22,22 @@ calc_tight_light_projection :: (camera: Camera, light_direction: Vector3) -> Mat
light_space_frustum = transform(view_frustum_in_world_space, light_view);
final_aabb := get_frustum_aabb(light_space_frustum);
// @Incomplete: Padding
// Texel size calculation based on shadow map resolution (e.g., 2048x2048)
texel_size_x := (final_aabb.max.x - final_aabb.min.x) / 4096.0;
texel_size_y := (final_aabb.max.y - final_aabb.min.y) / 4096.0;
// Snap the minimum bounds of the AABB to the nearest texel
final_aabb.min.x = floor(final_aabb.min.x / texel_size_x) * texel_size_x;
final_aabb.min.y = floor(final_aabb.min.y / texel_size_y) * texel_size_y;
// Recalculate the max bounds based on snapped min
final_aabb.max.x = final_aabb.min.x + (texel_size_x * 4096.0);
final_aabb.max.y = final_aabb.min.y + (texel_size_y * 4096.0);
// Padding
final_aabb.min -= .{8,5,8};
final_aabb.max += .{8,50, 8};
light_projection := orthographic_lh_projection_matrix(final_aabb.min.x, final_aabb.max.x, final_aabb.min.y, final_aabb.max.y, final_aabb.min.z, final_aabb.max.z);