void ParticleEmitter::setSpriteFrameCoords(unsigned int frameCount, int width, int height)
{
GP_ASSERT(width);
GP_ASSERT(height);
int x;
int y;
Rectangle* frameCoords = new Rectangle[frameCount];
unsigned int cols = _spriteTextureWidth / width;
unsigned int rows = _spriteTextureHeight / height;
unsigned int n = 0;
for (unsigned int i = 0; i < rows; ++i)
{
y = i * height;
for (unsigned int j = 0; j < cols; ++j)
{
x = j * width;
frameCoords[i*cols + j] = Rectangle(x, y, width, height);
if (++n == frameCount)
{
break;
}
}
if (n == frameCount)
{
break;
}
}
setSpriteFrameCoords(frameCount, frameCoords);
SAFE_DELETE_ARRAY(frameCoords);
}
void ParticleEmitter::setTexture(Texture* texture, BlendMode blendMode)
{
// Create new batch before releasing old one, in case the same texture
// is used for both (so it's not released before passing to the new batch).
SpriteBatch* batch = SpriteBatch::create(texture, NULL, _particleCountMax);
batch->getSampler()->setFilterMode(Texture::LINEAR_MIPMAP_LINEAR, Texture::LINEAR);
// Free existing batch
SAFE_DELETE(_spriteBatch);
_spriteBatch = batch;
_spriteBatch->getStateBlock()->setDepthWrite(false);
_spriteBatch->getStateBlock()->setDepthTest(true);
setBlendMode(blendMode);
_spriteTextureWidth = texture->getWidth();
_spriteTextureHeight = texture->getHeight();
_spriteTextureWidthRatio = 1.0f / (float)texture->getWidth();
_spriteTextureHeightRatio = 1.0f / (float)texture->getHeight();
// By default assume only one frame which uses the entire texture.
Rectangle texCoord((float)texture->getWidth(), (float)texture->getHeight());
setSpriteFrameCoords(1, &texCoord);
}