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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 <Availability.h>
#import "CCParticleSystemPoint.h"
#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
// opengl
#import "Platforms/CCGL.h"
// cocos2d
#import "CCTextureCache.h"
#import "ccMacros.h"
// support
#import "Support/OpenGL_Internal.h"
#import "Support/CGPointExtension.h"
@implementation CCParticleSystemPoint
-(id) initWithTotalParticles:(NSUInteger) numberOfParticles
{
if( (self=[super initWithTotalParticles:numberOfParticles]) ) {
vertices = malloc( sizeof(ccPointSprite) * totalParticles );
if( ! vertices ) {
NSLog(@"cocos2d: Particle system: not enough memory");
[self release];
return nil;
}
#if CC_USES_VBO
glGenBuffers(1, &verticesID);
// initial binding
glBindBuffer(GL_ARRAY_BUFFER, verticesID);
glBufferData(GL_ARRAY_BUFFER, sizeof(ccPointSprite)*totalParticles, vertices, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
}
return self;
}
-(void) dealloc
{
free(vertices);
#if CC_USES_VBO
glDeleteBuffers(1, &verticesID);
#endif
[super dealloc];
}
-(void) updateQuadWithParticle:(tCCParticle*)p newPosition:(CGPoint)newPos
{
// place vertices and colos in array
vertices[particleIdx].pos = (ccVertex2F) {newPos.x, newPos.y};
vertices[particleIdx].size = p->size;
ccColor4B color = { p->color.r*255, p->color.g*255, p->color.b*255, p->color.a*255 };
vertices[particleIdx].color = color;
}
-(void) postStep
{
#if CC_USES_VBO
glBindBuffer(GL_ARRAY_BUFFER, verticesID);
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(ccPointSprite)*particleCount, vertices);
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
}
-(void) draw
{
[super draw];
if (particleIdx==0)
return;
// Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
// Needed states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY
// Unneeded states: GL_TEXTURE_COORD_ARRAY
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glBindTexture(GL_TEXTURE_2D, texture_.name);
glEnable(GL_POINT_SPRITE_OES);
glTexEnvi( GL_POINT_SPRITE_OES, GL_COORD_REPLACE_OES, GL_TRUE );
#define kPointSize sizeof(vertices[0])
#if CC_USES_VBO
glBindBuffer(GL_ARRAY_BUFFER, verticesID);
glVertexPointer(2,GL_FLOAT, kPointSize, 0);
glColorPointer(4, GL_UNSIGNED_BYTE, kPointSize, (GLvoid*) offsetof(ccPointSprite, color) );
glEnableClientState(GL_POINT_SIZE_ARRAY_OES);
glPointSizePointerOES(GL_FLOAT, kPointSize, (GLvoid*) offsetof(ccPointSprite, size) );
#else // Uses Vertex Array List
int offset = (int)vertices;
glVertexPointer(2,GL_FLOAT, kPointSize, (GLvoid*) offset);
int diff = offsetof(ccPointSprite, color);
glColorPointer(4, GL_UNSIGNED_BYTE, kPointSize, (GLvoid*) (offset+diff));
glEnableClientState(GL_POINT_SIZE_ARRAY_OES);
diff = offsetof(ccPointSprite, size);
glPointSizePointerOES(GL_FLOAT, kPointSize, (GLvoid*) (offset+diff));
#endif
BOOL newBlend = blendFunc_.src != CC_BLEND_SRC || blendFunc_.dst != CC_BLEND_DST;
if( newBlend )
glBlendFunc( blendFunc_.src, blendFunc_.dst );
glDrawArrays(GL_POINTS, 0, particleIdx);
// restore blend state
if( newBlend )
glBlendFunc( CC_BLEND_SRC, CC_BLEND_DST);
#if CC_USES_VBO
// unbind VBO buffer
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
glDisableClientState(GL_POINT_SIZE_ARRAY_OES);
glDisable(GL_POINT_SPRITE_OES);
// restore GL default state
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
}
#pragma mark Non supported properties
//
// SPIN IS NOT SUPPORTED
//
-(void) setStartSpin:(float)a
{
NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
[super setStartSpin:a];
}
-(void) setStartSpinVar:(float)a
{
NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
[super setStartSpin:a];
}
-(void) setEndSpin:(float)a
{
NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
[super setStartSpin:a];
}
-(void) setEndSpinVar:(float)a
{
NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
[super setStartSpin:a];
}
//
// SIZE > 64 IS NOT SUPPORTED
//
-(void) setStartSize:(float)size
{
NSAssert(size >= 0 && size <= CC_MAX_PARTICLE_SIZE, @"PointParticleSystem only supports 0 <= size <= 64");
[super setStartSize:size];
}
-(void) setEndSize:(float)size
{
NSAssert( (size == kCCParticleStartSizeEqualToEndSize) ||
( size >= 0 && size <= CC_MAX_PARTICLE_SIZE), @"PointParticleSystem only supports 0 <= size <= 64");
[super setEndSize:size];
}
@end
#elif defined(__MAC_OS_X_VERSION_MAX_ALLOWED)
@implementation CCParticleSystemPoint
@end
#endif // __MAC_OS_X_VERSION_MAX_ALLOWED
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