From 0c391fdbce5a079cf03e483eb6174dd47806163d Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Wed, 7 Aug 2019 21:08:47 +0800
Subject: *misc

---
 Source/modules/asura-core/Graphics/MatrixStack.cpp | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 Source/modules/asura-core/Graphics/MatrixStack.cpp

(limited to 'Source/modules/asura-core/Graphics/MatrixStack.cpp')

diff --git a/Source/modules/asura-core/Graphics/MatrixStack.cpp b/Source/modules/asura-core/Graphics/MatrixStack.cpp
new file mode 100644
index 0000000..987d29c
--- /dev/null
+++ b/Source/modules/asura-core/Graphics/MatrixStack.cpp
@@ -0,0 +1,75 @@
+#include "MatrixStack.h"
+
+namespace_begin(AsuraEngine)
+namespace_begin(Graphics)
+
+MatrixStack::MatrixStack()
+	: top(0)
+{
+	// 栈的最下面初始就是栈顶，并用此保证栈永远非空（即可以取值）
+	m_Stack[top].SetIdentity();
+}
+
+MatrixStack::~MatrixStack()
+{
+}
+
+void MatrixStack::LoadIdentity()
+{
+	m_Stack[top].SetIdentity();
+}
+
+bool MatrixStack::Push()
+{
+	if (top == ASURA_MAX_MATRIX_STACK_DEPTH - 1)
+		return false;
+	++top; 
+	m_Stack[top] = m_Stack[top - 1];
+	return true;
+}
+
+bool MatrixStack::Pop()
+{
+	if (top == 0)
+		return false;
+	--top; 
+	return true;
+}
+
+AEMath::Matrix44& MatrixStack::GetTop()
+{
+	return m_Stack[top];
+}
+
+uint MatrixStack::GetTopIndex()
+{
+	return top; 
+}
+
+uint MatrixStack::GetCapacity()
+{
+	return ASURA_MAX_MATRIX_STACK_DEPTH;
+}
+
+void MatrixStack::Ortho(float left, float right, float bottom, float top, float near, float far)
+{
+	m_Stack[this->top].Ortho(left, right, bottom, top, near, far);
+}
+
+void MatrixStack::Rotate(float angle)
+{
+	m_Stack[top].Rotate(angle);
+}
+
+void MatrixStack::Translate(float x, float y)
+{
+	m_Stack[top].Translate(x, y);
+}
+
+void MatrixStack::Scale(float x, float y)
+{
+	m_Stack[top].Scale(x, y);
+}
+
+namespace_end
+namespace_end
\ No newline at end of file
-- 
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