Initial commit of the shadow map generator and shadows render interface

Lots of hard coding, buggy in places, far from great, but the basics
work.

1 files changed, 46 insertions, 0 deletions

diff --git a/gfx/gl/shadowMapper.h b/gfx/gl/shadowMapper.h
new file mode 100644
index 0000000..dcd0a02
--- /dev/null
+++ b/gfx/gl/shadowMapper.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "lib/glArrays.h"
+#include "program.h"
+#include <glm/vec2.hpp>
+
+class SceneProvider;
+
+class ShadowMapper {
+public:
+	ShadowMapper(const glm::ivec2 & size = {1024, 1024});
+
+	glm::mat4x4 update(const SceneProvider &, const glm::vec3 & direction) const;
+
+	class FixedPoint : public Program {
+	public:
+		FixedPoint();
+		void setViewProjection(const glm::mat4 &) const;
+		void use() const;
+
+	private:
+		RequiredUniformLocation viewProjectionLoc;
+	};
+	class DynamicPoint : public Program {
+	public:
+		DynamicPoint();
+		void setViewProjection(const glm::mat4 &) const;
+		void use(const Location &) const;
+
+	private:
+		RequiredUniformLocation viewProjectionLoc;
+		RequiredUniformLocation modelLoc;
+	};
+	FixedPoint fixedPoint;
+	DynamicPoint dynamicPoint;
+
+	operator GLuint() const
+	{
+		return depthMap;
+	}
+
+private:
+	glFrameBuffer depthMapFBO;
+	glTexture depthMap;
+	glm::ivec2 size;
+};