Psycho-rebased branch billboard-shadows on top of main

1 files changed, 28 insertions, 2 deletions

diff --git a/gfx/models/mesh.h b/gfx/models/mesh.h
index 248cb8f..8791aed 100644
--- a/gfx/models/mesh.h
+++ b/gfx/models/mesh.h
@@ -1,8 +1,10 @@
 #pragma once
 
+#include "config/types.h"
 #include "gfx/gl/vertexArrayObject.h"
 #include <glArrays.h>
 #include <glad/gl.h>
+#include <ranges>
 #include <span>
 #include <stdTypeDefs.h>
 
@@ -10,22 +12,46 @@ class Vertex;
 
 class MeshBase {
 public:
+	class Dimensions {
+	public:
+		using Extents1D = std::ranges::minmax_result<RelativeDistance>;
+		explicit Dimensions(const std::span<const RelativePosition3D>);
+
+		RelativePosition3D minExtent, maxExtent;
+		RelativePosition3D centre;
+		RelativeDistance size;
+
+	private:
+		Dimensions(const std::span<const RelativePosition3D>, const std::array<Extents1D, 3> &);
+		static Extents1D extents(const std::span<const RelativePosition3D>, glm::length_t D);
+	};
+
 	void Draw() const;
 	void DrawInstanced(GLuint vao, GLsizei count, GLuint base = 0) const;
 
+	[[nodiscard]] const Dimensions &
+	getDimensions() const
+	{
+		return dimensions;
+	}
+
 protected:
-	MeshBase(GLsizei m_numIndices, GLenum mode);
+	MeshBase(GLsizei m_numIndices, GLenum mode, const std::vector<RelativePosition3D> &);
 
 	glVertexArray m_vertexArrayObject;
 	glBuffers<2> m_vertexArrayBuffers;
 	GLsizei m_numIndices;
 	GLenum mode;
+	Dimensions dimensions;
 };
 
 template<typename V> class MeshT : public MeshBase, public ConstTypeDefs<MeshT<V>> {
 public:
 	MeshT(const std::span<const V> vertices, const std::span<const unsigned int> indices, GLenum mode = GL_TRIANGLES) :
-		MeshBase {static_cast<GLsizei>(indices.size()), mode}
+		MeshBase {static_cast<GLsizei>(indices.size()), mode,
+				materializeRange(vertices | std::views::transform([](const auto & v) {
+					return static_cast<RelativePosition3D>(v.pos);
+				}))}
 	{
 		VertexArrayObject::data(vertices, m_vertexArrayBuffers[0], GL_ARRAY_BUFFER);
 		VertexArrayObject::data(indices, m_vertexArrayBuffers[1], GL_ARRAY_BUFFER);