Support for the BillboardPainter

Based on the ShadowStenciller, creates flattened images of a model for
simplified mass use in a scene.

1 files changed, 28 insertions, 0 deletions

diff --git a/gfx/gl/billboardPainter.h b/gfx/gl/billboardPainter.h
new file mode 100644
index 0000000..4ce7b10
--- /dev/null
+++ b/gfx/gl/billboardPainter.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include "gfx/gl/program.h"
+#include "gfx/models/mesh.h"
+#include "gfx/models/texture.h"
+#include "glArrays.h"
+
+class LightDirection;
+
+class BillboardPainter {
+public:
+	template<typename T> static constexpr T VIEW_ANGLES = 8;
+
+	BillboardPainter();
+
+	[[nodiscard]]
+	static glTextures<3> createBillBoardTextures(GLsizei width, GLsizei height);
+	void setView(const glm::mat4 &);
+	void renderBillBoard(const glTextures<3> &, const MeshBase &, Texture::AnyPtr texture) const;
+
+private:
+	glFrameBuffer fbo;
+	Program program;
+	Program::RequiredUniformLocation viewProjectionLoc {program, "viewProjection"};
+	Program::RequiredUniformLocation viewLoc {program, "view"};
+
+	glm::mat4 view;
+};