From bad78945ceba425f6a80e3b8dca2414d592970eb Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Fri, 2 Aug 2019 20:51:00 +0800
Subject: =?UTF-8?q?*=E4=BF=AE=E6=94=B9=E6=96=87=E4=BB=B6=E5=90=8D=E6=A0=BC?=
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---
 source/modules/asura-core/Graphics/MatrixStack.h | 58 ++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 source/modules/asura-core/Graphics/MatrixStack.h

(limited to 'source/modules/asura-core/Graphics/MatrixStack.h')

diff --git a/source/modules/asura-core/Graphics/MatrixStack.h b/source/modules/asura-core/Graphics/MatrixStack.h
new file mode 100644
index 0000000..867011e
--- /dev/null
+++ b/source/modules/asura-core/Graphics/MatrixStack.h
@@ -0,0 +1,58 @@
+#ifndef _ASURA_MATRIX_STACK_H_
+#define _ASURA_MATRIX_STACK_H_
+
+#include <asura-utils/Type.h>
+#include <asura-utils/Math/Matrix44.h>
+#include <asura-utils/Classes.h>
+
+namespace_begin(AsuraEngine)
+namespace_begin(Graphics)
+
+///
+/// 栈的矩阵深度。
+///
+#define ASURA_MAX_MATRIX_STACK_DEPTH 32 // 2KB
+
+///
+/// 保存栈状态，用来恢复之前的状态。栈中的一个矩阵stack[i]的值是stack[0]*..*stack[i-1]
+/// 的值，并附加一系列transform。
+/// 
+/// TODO: template<uint _capacity> MatrixStack
+///
+class MatrixStack
+{
+public:
+
+	MatrixStack();
+	~MatrixStack();
+
+	void LoadIdentity();
+	bool Push();
+	bool Pop();
+
+	AEMath::Matrix44& GetTop();
+	void GetTop(ASURA_OUT AEMath::Matrix44& mat44);
+
+	void LoadMatrix(const AEMath::Matrix44& mat44);
+	void MultMatrix(const AEMath::Matrix44& mat44);
+
+	void Rotate(float angle);
+	void Translate(float x, float y);
+	void Scale(float x, float y);
+
+	void Ortho(float l, float r, float b, float t, float n, float f);
+
+	uint GetTopIndex();
+	uint GetCapacity();
+
+private: 
+
+	AEMath::Matrix44 m_Stack[ASURA_MAX_MATRIX_STACK_DEPTH];
+	uint8            top;
+
+};
+
+namespace_end
+namespace_end
+
+#endif
\ No newline at end of file
-- 
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