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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008-2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#import <math.h>
+#import <stdlib.h>
+#import <string.h>
+
+#import "CCDrawingPrimitives.h"
+#import "ccTypes.h"
+#import "ccMacros.h"
+#import "Platforms/CCGL.h"
+
+void ccDrawPoint( CGPoint point )
+{
+        ccVertex2F p = (ccVertex2F) {point.x * CC_CONTENT_SCALE_FACTOR(), point.y * CC_CONTENT_SCALE_FACTOR() };
+        
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_VERTEX_ARRAY, 
+        // Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY, GL_COLOR_ARRAY       
+        glDisable(GL_TEXTURE_2D);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_COLOR_ARRAY);
+        
+        glVertexPointer(2, GL_FLOAT, 0, &p);    
+        glDrawArrays(GL_POINTS, 0, 1);
+
+        // restore default state
+        glEnableClientState(GL_COLOR_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glEnable(GL_TEXTURE_2D);        
+}
+
+void ccDrawPoints( const CGPoint *points, NSUInteger numberOfPoints )
+{
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_VERTEX_ARRAY, 
+        // Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY, GL_COLOR_ARRAY       
+        glDisable(GL_TEXTURE_2D);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_COLOR_ARRAY);
+
+        ccVertex2F newPoints[numberOfPoints];
+
+        // iPhone and 32-bit machines optimization
+        if( sizeof(CGPoint) == sizeof(ccVertex2F) ) {
+
+                // points ?
+                if( CC_CONTENT_SCALE_FACTOR() != 1 ) {
+                        for( NSUInteger i=0; i<numberOfPoints;i++)
+                                newPoints[i] =  (ccVertex2F){ points[i].x * CC_CONTENT_SCALE_FACTOR(), points[i].y * CC_CONTENT_SCALE_FACTOR() };
+
+                        glVertexPointer(2, GL_FLOAT, 0, newPoints);
+
+                } else
+                        glVertexPointer(2, GL_FLOAT, 0, points);
+                
+                glDrawArrays(GL_POINTS, 0, (GLsizei) numberOfPoints);
+                
+        } else {
+                
+                // Mac on 64-bit
+                for( NSUInteger i=0; i<numberOfPoints;i++)
+                        newPoints[i] = (ccVertex2F) { points[i].x, points[i].y };
+                        
+                glVertexPointer(2, GL_FLOAT, 0, newPoints);
+                glDrawArrays(GL_POINTS, 0, (GLsizei) numberOfPoints);
+
+        }
+
+        
+        // restore default state
+        glEnableClientState(GL_COLOR_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glEnable(GL_TEXTURE_2D);        
+}
+
+
+void ccDrawLine( CGPoint origin, CGPoint destination )
+{
+        ccVertex2F vertices[2] = {
+                {origin.x * CC_CONTENT_SCALE_FACTOR(), origin.y * CC_CONTENT_SCALE_FACTOR() },
+                {destination.x * CC_CONTENT_SCALE_FACTOR(), destination.y * CC_CONTENT_SCALE_FACTOR() }
+        };
+
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_VERTEX_ARRAY, 
+        // Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY, GL_COLOR_ARRAY       
+        glDisable(GL_TEXTURE_2D);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_COLOR_ARRAY);
+        
+        glVertexPointer(2, GL_FLOAT, 0, vertices);      
+        glDrawArrays(GL_LINES, 0, 2);
+        
+        // restore default state
+        glEnableClientState(GL_COLOR_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glEnable(GL_TEXTURE_2D);                
+}
+
+
+void ccDrawPoly( const CGPoint *poli, NSUInteger numberOfPoints, BOOL closePolygon )
+{
+        ccVertex2F newPoint[numberOfPoints];
+
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_VERTEX_ARRAY, 
+        // Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY, GL_COLOR_ARRAY       
+        glDisable(GL_TEXTURE_2D);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_COLOR_ARRAY);
+
+        
+        // iPhone and 32-bit machines
+        if( sizeof(CGPoint) == sizeof(ccVertex2F) ) {
+
+                // convert to pixels ?
+                if( CC_CONTENT_SCALE_FACTOR() != 1 ) {
+                        memcpy( newPoint, poli, numberOfPoints * sizeof(ccVertex2F) );
+                        for( NSUInteger i=0; i<numberOfPoints;i++)
+                                newPoint[i] = (ccVertex2F) { poli[i].x * CC_CONTENT_SCALE_FACTOR(), poli[i].y * CC_CONTENT_SCALE_FACTOR() };
+
+                        glVertexPointer(2, GL_FLOAT, 0, newPoint);
+
+                } else
+                        glVertexPointer(2, GL_FLOAT, 0, poli);
+
+                
+        } else {
+                // 64-bit machines (Mac)
+                
+                for( NSUInteger i=0; i<numberOfPoints;i++)
+                        newPoint[i] = (ccVertex2F) { poli[i].x, poli[i].y };
+
+                glVertexPointer(2, GL_FLOAT, 0, newPoint );
+
+        }
+                
+        if( closePolygon )
+                glDrawArrays(GL_LINE_LOOP, 0, (GLsizei) numberOfPoints);
+        else
+                glDrawArrays(GL_LINE_STRIP, 0, (GLsizei) numberOfPoints);
+        
+        // restore default state
+        glEnableClientState(GL_COLOR_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glEnable(GL_TEXTURE_2D);        
+}
+
+void ccDrawCircle( CGPoint center, float r, float a, NSUInteger segs, BOOL drawLineToCenter)
+{
+        int additionalSegment = 1;
+        if (drawLineToCenter)
+                additionalSegment++;
+
+        const float coef = 2.0f * (float)M_PI/segs;
+        
+        GLfloat *vertices = calloc( sizeof(GLfloat)*2*(segs+2), 1);
+        if( ! vertices )
+                return;
+
+        for(NSUInteger i=0;i<=segs;i++)
+        {
+                float rads = i*coef;
+                GLfloat j = r * cosf(rads + a) + center.x;
+                GLfloat k = r * sinf(rads + a) + center.y;
+                
+                vertices[i*2] = j * CC_CONTENT_SCALE_FACTOR();
+                vertices[i*2+1] =k * CC_CONTENT_SCALE_FACTOR();
+        }
+        vertices[(segs+1)*2] = center.x * CC_CONTENT_SCALE_FACTOR();
+        vertices[(segs+1)*2+1] = center.y * CC_CONTENT_SCALE_FACTOR();
+        
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_VERTEX_ARRAY, 
+        // Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY, GL_COLOR_ARRAY       
+        glDisable(GL_TEXTURE_2D);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_COLOR_ARRAY);
+        
+        glVertexPointer(2, GL_FLOAT, 0, vertices);      
+        glDrawArrays(GL_LINE_STRIP, 0, (GLsizei) segs+additionalSegment);
+        
+        // restore default state
+        glEnableClientState(GL_COLOR_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glEnable(GL_TEXTURE_2D);        
+        
+        free( vertices );
+}
+
+void ccDrawQuadBezier(CGPoint origin, CGPoint control, CGPoint destination, NSUInteger segments)
+{
+        ccVertex2F vertices[segments + 1];
+        
+        float t = 0.0f;
+        for(NSUInteger i = 0; i < segments; i++)
+        {
+                GLfloat x = powf(1 - t, 2) * origin.x + 2.0f * (1 - t) * t * control.x + t * t * destination.x;
+                GLfloat y = powf(1 - t, 2) * origin.y + 2.0f * (1 - t) * t * control.y + t * t * destination.y;
+                vertices[i] = (ccVertex2F) {x * CC_CONTENT_SCALE_FACTOR(), y * CC_CONTENT_SCALE_FACTOR() };
+                t += 1.0f / segments;
+        }
+        vertices[segments] = (ccVertex2F) {destination.x * CC_CONTENT_SCALE_FACTOR(), destination.y * CC_CONTENT_SCALE_FACTOR() };
+        
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_VERTEX_ARRAY, 
+        // Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY, GL_COLOR_ARRAY       
+        glDisable(GL_TEXTURE_2D);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_COLOR_ARRAY);
+        
+        glVertexPointer(2, GL_FLOAT, 0, vertices);      
+        glDrawArrays(GL_LINE_STRIP, 0, (GLsizei) segments + 1);
+        
+        // restore default state
+        glEnableClientState(GL_COLOR_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glEnable(GL_TEXTURE_2D);        
+}
+
+void ccDrawCubicBezier(CGPoint origin, CGPoint control1, CGPoint control2, CGPoint destination, NSUInteger segments)
+{
+        ccVertex2F vertices[segments + 1];
+        
+        float t = 0;
+        for(NSUInteger i = 0; i < segments; i++)
+        {
+                GLfloat x = powf(1 - t, 3) * origin.x + 3.0f * powf(1 - t, 2) * t * control1.x + 3.0f * (1 - t) * t * t * control2.x + t * t * t * destination.x;
+                GLfloat y = powf(1 - t, 3) * origin.y + 3.0f * powf(1 - t, 2) * t * control1.y + 3.0f * (1 - t) * t * t * control2.y + t * t * t * destination.y;
+                vertices[i] = (ccVertex2F) {x * CC_CONTENT_SCALE_FACTOR(), y * CC_CONTENT_SCALE_FACTOR() };
+                t += 1.0f / segments;
+        }
+        vertices[segments] = (ccVertex2F) {destination.x * CC_CONTENT_SCALE_FACTOR(), destination.y * CC_CONTENT_SCALE_FACTOR() };
+        
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_VERTEX_ARRAY, 
+        // Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY, GL_COLOR_ARRAY       
+        glDisable(GL_TEXTURE_2D);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_COLOR_ARRAY);
+        
+        glVertexPointer(2, GL_FLOAT, 0, vertices);      
+        glDrawArrays(GL_LINE_STRIP, 0, (GLsizei) segments + 1);
+        
+        // restore default state
+        glEnableClientState(GL_COLOR_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glEnable(GL_TEXTURE_2D);        
+}