Merge branch 'billboard-shadows'

1 files changed, 27 insertions, 0 deletions

diff --git a/gfx/gl/shadowStenciller.h b/gfx/gl/shadowStenciller.h
new file mode 100644
index 0000000..f774ac7
--- /dev/null
+++ b/gfx/gl/shadowStenciller.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include "gfx/gl/program.h"
+#include "gfx/models/mesh.h"
+#include "gfx/models/texture.h"
+#include "glArrays.h"
+
+class LightDirection;
+
+class ShadowStenciller {
+public:
+	template<typename T> static constexpr T STENCIL_ANGLES = 8;
+
+	ShadowStenciller();
+
+	[[nodiscard]]
+	static glTexture createStencilTexture(GLsizei width, GLsizei height);
+	void setLightDirection(const LightDirection & lightDir);
+	void renderStencil(const glTexture &, const MeshBase &, Texture::AnyPtr texture) const;
+
+private:
+	glFrameBuffer fbo;
+	Program shadowCaster;
+	Program::RequiredUniformLocation viewProjectionLoc {shadowCaster, "viewProjection"};
+
+	std::array<glm::mat4, STENCIL_ANGLES<size_t>> viewProjections;
+};