From 60cbbdec07ab7a5636eac5b3c024ae44e937f4d4 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Mon, 13 Dec 2021 00:07:19 +0800
Subject: +init

---
 Client/Source/Graphics/VertexAttribute.h | 52 ++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Client/Source/Graphics/VertexAttribute.h

(limited to 'Client/Source/Graphics/VertexAttribute.h')

diff --git a/Client/Source/Graphics/VertexAttribute.h b/Client/Source/Graphics/VertexAttribute.h
new file mode 100644
index 0000000..8f7bc82
--- /dev/null
+++ b/Client/Source/Graphics/VertexAttribute.h
@@ -0,0 +1,52 @@
+#pragma once
+
+#include <vector>
+
+#include "../Utilities/UtilMacros.h"
+
+#include "OpenGL.h"
+#include "GPUDataBuffer.h"
+
+// component format
+enum VertexAttrFormat
+{
+	VertexAttrFormat_Float = 0,   // position\normal\tangent\uv\uv2\uv3\uv4
+	VertexAttrFormat_Float16,
+	VertexAttrFormat_Color,   // color
+	VertexAttrFormat_Byte,
+	VertexAttrFormat_Unsigned_Byte,
+
+	VertexAttrFormat_Count
+};
+
+struct VertexAttributeDescriptor
+{
+	//union {
+	const void* pointer;  // 内存地址，刚创建时留空
+	int startOffset; // 显存中相对VBO的偏移值
+	//};
+	uint componentNum;    // 向量维度1,2,3,4
+	uint componentFormat; // 每个分量的类型
+	uint16 stride;        // 间隔
+	bool normalize;       // 是否归一化，只用于CustomVertexLayout
+
+	// for default vertex layout
+	VertexAttributeDescriptor() {}
+	// for custom vertex layout
+	VertexAttributeDescriptor(int startOff, uint num, uint fmt, uint16 strd, bool normalized = false)
+	{
+		startOffset = startOff;
+		componentNum = num;
+		componentFormat = fmt;
+		stride = strd;
+		normalize = normalized;
+	}
+
+};
+
+namespace VertexAttribute
+{
+
+	extern GLenum ConvertAttrFormatToGLFormat(uint fmt);
+
+}
-- 
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