axmol/cocos2dx/CCDrawingPrimitives.cpp

/****************************************************************************
Copyright (c) 2010-2011 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada

http://www.cocos2d-x.org

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#include "CCDrawingPrimitives.h"
#include "ccTypes.h"
#include "ccMacros.h"
#include "CCGL.h"

#include <string.h>
#include <cmath>
#include "CCGL.h"

#ifndef M_PI
	#define M_PI       3.14159265358979323846
#endif

namespace   cocos2d {

void ccDrawPoint(CCPoint point)
{
	ccVertex2F p = {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 CCPoint *points, unsigned int 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 = new ccVertex2F[numberOfPoints];

	// iPhone and 32-bit machines optimization
	if( sizeof(CCPoint) == sizeof(ccVertex2F) ) {

		// points ?
		if( CC_CONTENT_SCALE_FACTOR() != 1 ) 
		{
			for( unsigned int i= 0; i < numberOfPoints; i++)
			{
				newPoints[i].x = points[i].x * CC_CONTENT_SCALE_FACTOR();
				newPoints[i].y = points[i].y * CC_CONTENT_SCALE_FACTOR();
			}

			glVertexPointer(2, GL_FLOAT, 0, newPoints);

		} else
			glVertexPointer(2, GL_FLOAT, 0, points);

		glDrawArrays(GL_POINTS, 0, numberOfPoints);

	} else {

		// Mac on 64-bit
		for( unsigned int i = 0; i < numberOfPoints; i++)
		{
			newPoints[i].x = points[i].x;
			newPoints[i].y = points[i].y;
		}

		glVertexPointer(2, GL_FLOAT, 0, newPoints);
		glDrawArrays(GL_POINTS, 0, numberOfPoints);
	}

	delete[] newPoints;
	
	// restore default state
	glEnableClientState(GL_COLOR_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	glEnable(GL_TEXTURE_2D);	
}

void ccDrawLine(CCPoint origin, CCPoint 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 CCPoint *poli, int numberOfPoints, bool closePolygon)
{
    ccVertex2F* newPoint = new ccVertex2F[numberOfPoints];
    if (! newPoint)
    {
        return;
    }
    // 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(CCPoint) == sizeof(ccVertex2F) ) {

        // convert to pixels ?
        if( CC_CONTENT_SCALE_FACTOR() != 1 ) {
            memcpy( newPoint, poli, numberOfPoints * sizeof(ccVertex2F) );
            for( int i=0; i<numberOfPoints;i++)
            {
                newPoint[i].x = poli[i].x * CC_CONTENT_SCALE_FACTOR();
                newPoint[i].y = 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( int i=0; i<numberOfPoints;i++)
        {
            newPoint[i].x = poli[i].x;
            newPoint[i].y = poli[i].y;
        }

        glVertexPointer(2, GL_FLOAT, 0, newPoint );

    }

    if( closePolygon )
        glDrawArrays(GL_LINE_LOOP, 0, numberOfPoints);
    else
        glDrawArrays(GL_LINE_STRIP, 0, numberOfPoints);

    // restore default state
    glEnableClientState(GL_COLOR_ARRAY);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
    glEnable(GL_TEXTURE_2D);
    delete[] newPoint;
}

void ccDrawCircle(CCPoint center, float r, float a, int segs, bool drawLineToCenter)
{
	int additionalSegment = 1;
	if (drawLineToCenter)
	{
		++additionalSegment;
	}

	const float coef = 2.0f * (float) (M_PI) /segs;

	float *vertices = new float[2*(segs+2)]; //	float *vertices = (float *)malloc( sizeof(float)*2*(segs+2));
	if( ! vertices )
	{
		return;
	}
	
	memset( vertices,0, sizeof(float)*2*(segs+2));
	
	for(int i=0;i<=segs;i++)
	{
		float rads = i*coef;
		float j = r * cosf(rads + a) + center.x;
		float 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, segs+additionalSegment);
	
	// restore default state
	glEnableClientState(GL_COLOR_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	glEnable(GL_TEXTURE_2D);	

	delete[] vertices; //	free(vertices);
}

void ccDrawQuadBezier(CCPoint origin, CCPoint control, CCPoint destination, int segments)
{
	CCPoint *vertices = new CCPoint[segments + 1];
	
	float t = 0.0f;
	for(int i = 0; i < segments; i++)
	{
		float x = powf(1 - t, 2) * origin.x + 2.0f * (1 - t) * t * control.x + t * t * destination.x;
		float y = powf(1 - t, 2) * origin.y + 2.0f * (1 - t) * t * control.y + t * t * destination.y;
		vertices[i] = CCPointMake(x * CC_CONTENT_SCALE_FACTOR(), y * CC_CONTENT_SCALE_FACTOR());
		t += 1.0f / segments;
	}
	vertices[segments] = CCPointMake(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, segments + 1);
	delete[] vertices;
	
	// restore default state
	glEnableClientState(GL_COLOR_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	glEnable(GL_TEXTURE_2D);	
}

void ccDrawCubicBezier(CCPoint origin, CCPoint control1, CCPoint control2, CCPoint destination, int segments)
{
	CCPoint *vertices = new CCPoint[segments + 1];
	
	float t = 0;
	for(int i = 0; i < segments; ++i)
	{
		float 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;
		float 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] = CCPointMake(x * CC_CONTENT_SCALE_FACTOR(), y * CC_CONTENT_SCALE_FACTOR());
		t += 1.0f / segments;
	}
	vertices[segments] = CCPointMake(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, segments + 1);
	delete[] vertices;
	
	// restore default state
	glEnableClientState(GL_COLOR_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
	glEnable(GL_TEXTURE_2D);	
}
}//namespace   cocos2d