From aa75b018f3b97c72b57de68867417cbda51439c3 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 3 Dec 2022 03:41:32 +0000
Subject: 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.
---
 gfx/gl/shadowMapper.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 gfx/gl/shadowMapper.h

(limited to 'gfx/gl/shadowMapper.h')

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;
+};
-- 
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