Added Box2D

external/Box2D-2.3.1/Contributions/Platforms/iPhone/Classes/GLES-Render.mm

@@ -0,0 +1,149 @@
+/*
+* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
+*
+* iPhone port by Simon Oliver - http://www.simonoliver.com - http://www.handcircus.com
+*
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 1. The origin of this software must not be misrepresented; you must not
+* claim that you wrote the original software. If you use this software
+* in a product, an acknowledgment in the product documentation would be
+* appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+* misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "GLES-Render.h"
+
+
+#include <cstdio>
+#include <cstdarg>
+
+#include <cstring>
+
+void GLESDebugDraw::DrawPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
+{
+	glColor4f(color.r, color.g, color.b,1);
+	glVertexPointer(2, GL_FLOAT, 0, vertices);
+	glDrawArrays(GL_LINE_LOOP, 0, vertexCount);
+}
+
+void GLESDebugDraw::DrawSolidPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
+{
+	glVertexPointer(2, GL_FLOAT, 0, vertices);
+	
+	glColor4f(color.r, color.g, color.b,0.5f);
+	glDrawArrays(GL_TRIANGLE_FAN, 0, vertexCount);
+	
+	glColor4f(color.r, color.g, color.b,1);
+	glDrawArrays(GL_LINE_LOOP, 0, vertexCount);
+}
+
+void GLESDebugDraw::DrawCircle(const b2Vec2& center, float32 radius, const b2Color& color)
+{
+	const float32 k_segments = 16.0f;
+	int vertexCount=16;
+	const float32 k_increment = 2.0f * b2_pi / k_segments;
+	float32 theta = 0.0f;
+	
+	GLfloat				glVertices[vertexCount*2];
+	for (int32 i = 0; i < k_segments; ++i)
+	{
+		b2Vec2 v = center + radius * b2Vec2(cosf(theta), sinf(theta));
+		glVertices[i*2]=v.x;
+		glVertices[i*2+1]=v.y;
+		theta += k_increment;
+	}
+	
+	glColor4f(color.r, color.g, color.b,1);
+	glVertexPointer(2, GL_FLOAT, 0, glVertices);
+	
+	glDrawArrays(GL_TRIANGLE_FAN, 0, vertexCount);
+}
+
+void GLESDebugDraw::DrawSolidCircle(const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color& color)
+{
+	const float32 k_segments = 16.0f;
+	int vertexCount=16;
+	const float32 k_increment = 2.0f * b2_pi / k_segments;
+	float32 theta = 0.0f;
+	
+	GLfloat				glVertices[vertexCount*2];
+	for (int32 i = 0; i < k_segments; ++i)
+	{
+		b2Vec2 v = center + radius * b2Vec2(cosf(theta), sinf(theta));
+		glVertices[i*2]=v.x;
+		glVertices[i*2+1]=v.y;
+		theta += k_increment;
+	}
+	
+	glColor4f(color.r, color.g, color.b,0.5f);
+	glVertexPointer(2, GL_FLOAT, 0, glVertices);
+	glDrawArrays(GL_TRIANGLE_FAN, 0, vertexCount);
+	glColor4f(color.r, color.g, color.b,1);
+	glDrawArrays(GL_LINE_LOOP, 0, vertexCount);
+	
+	// Draw the axis line
+	DrawSegment(center,center+radius*axis,color);
+}
+
+void GLESDebugDraw::DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color)
+{
+	glColor4f(color.r, color.g, color.b,1);
+	GLfloat				glVertices[] = {
+		p1.x,p1.y,p2.x,p2.y
+	};
+	glVertexPointer(2, GL_FLOAT, 0, glVertices);
+	glDrawArrays(GL_LINES, 0, 2);
+}
+
+void GLESDebugDraw::DrawTransform(const b2Transform& xf)
+{
+	b2Vec2 p1 = xf.position, p2;
+	const float32 k_axisScale = 0.4f;
+
+	p2 = p1 + k_axisScale * xf.R.col1;
+	DrawSegment(p1,p2,b2Color(1,0,0));
+	
+	p2 = p1 + k_axisScale * xf.R.col2;
+	DrawSegment(p1,p2,b2Color(0,1,0));
+}
+
+void GLESDebugDraw::DrawPoint(const b2Vec2& p, float32 size, const b2Color& color)
+{
+	glColor4f(color.r, color.g, color.b,1);
+	glPointSize(size);
+	GLfloat				glVertices[] = {
+		p.x,p.y
+	};
+	glVertexPointer(2, GL_FLOAT, 0, glVertices);
+	glDrawArrays(GL_POINTS, 0, 1);
+	glPointSize(1.0f);
+}
+
+void GLESDebugDraw::DrawString(int x, int y, const char *string, ...)
+{
+
+	/* Unsupported as yet. Could replace with bitmap font renderer at a later date */
+}
+
+void GLESDebugDraw::DrawAABB(b2AABB* aabb, const b2Color& c)
+{
+	
+	glColor4f(c.r, c.g, c.b,1);
+
+	GLfloat				glVertices[] = {
+		aabb->lowerBound.x, aabb->lowerBound.y,
+		aabb->upperBound.x, aabb->lowerBound.y,
+		aabb->upperBound.x, aabb->upperBound.y,
+		aabb->lowerBound.x, aabb->upperBound.y
+	};
+	glVertexPointer(2, GL_FLOAT, 0, glVertices);
+	glDrawArrays(GL_LINE_LOOP, 0, 8);
+	
+}