From 855da86feae1a5cc14dc2d486ccf115f484dbc2e Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Mon, 25 Apr 2022 20:22:07 -0700
Subject: Changeset: 16 Initial work on rendering sprites to screen

---
 source/Renderer.hpp | 47 +++++++++++++++++++++++++++++++----------------
 1 file changed, 31 insertions(+), 16 deletions(-)

(limited to 'source/Renderer.hpp')

diff --git a/source/Renderer.hpp b/source/Renderer.hpp
index 18a1e6e..b4ca735 100644
--- a/source/Renderer.hpp
+++ b/source/Renderer.hpp
@@ -1,46 +1,61 @@
 #pragma once
 
+#include "Camera.hpp"
 #include "Material.hpp"
-#include "Mesh.hpp"
 #include "RcPtr.hpp"
+#include "VertexIndex.hpp"
 
 #include <glad/glad.h>
+#include <cstddef>
 #include <glm/glm.hpp>
 
+// TODO add optional support for OpenGL separate attrib binding & only depend on vertex format
+
+// By default, RenderObject sets a default material but not data buffers.
 class RenderObject {
 public:
 	glm::mat4 worldMatrix;
 
 private:
 	RcPtr<Material> mMaterial;
-	RcPtr<GpuMesh> mMesh;
+	RcPtr<GpuIndexBuffer> mIndexBuf;
+	RcPtr<VertexFormat> mVertexFormat;
+	BufferBindings mVertexBufBinding;
 	GLuint mVao;
 
 public:
-	RenderObject(GpuMesh* mesh, Material* material);
+	RenderObject();
 	~RenderObject();
 
-	GLuint GetGLVao() const { return mVao; }
+	GLuint GetGLVao() const;
+	void RebuildIfNecessary();
+
 	Material* GetMaterial() const { return mMaterial.Get(); }
-	GpuMesh* GetMesh() const { return mMesh.Get(); }
-};
+	void SetMaterial(Material* material);
 
-class Camera {
-public:
-	glm::mat4 viewMatrix;
-	glm::mat4 projectionMatrix;
+	GpuIndexBuffer* GetIndexBuffer() const { return mIndexBuf.Get(); }
+	const VertexFormat* GetVertexFormat() const { return mVertexFormat.Get(); }
+	const BufferBindings& GetVertexBufferBindings() const { return mVertexBufBinding; }
+	void UpdateIndexBuffer(GpuIndexBuffer* indexBuffer);
+	void UpdateVertexFormat(VertexFormat* vertexFormat);
+	// Assumes the fetched BufferBinding object is modified
+	void UpdateVertexBufferBindings(BufferBindings** bindingsOut);
+	void SetFormat(VertexFormat* vertexFormat, Tags::IndexType indexFormat);
 
-public:
-	void Move(glm::vec3 pos);
-	void LookAt(glm::vec3 pos);
+private:
+	void DeleteGLObjects();
 };
 
 class Renderer {
 private:
-	Camera* mCam;
+	Camera* mFrame_Cam;
+	glm::mat4 mFrame_Transform;
+	float mFrame_Time;
+	float mFrame_DeltaTime;
+	bool mInsideFrame = false;
 
 public:
-	void BeginFrame();
+	void BeginFrame(Camera& camera, float currentTime, float deltaTime);
+	void Draw(const RenderObject* objects, size_t count);
 	void EndFrame();
-	void Draw(RenderObject& object);
 };
-- 
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