Forum

[Johanovski]

Hi Mr Jack!

I've changed something in my code to stop enabling / disabling things each time a image is drawn and I've grouped those functions at the start and finish of the renderScene method, so now I have this:

-(void)renderScene
{
	[EAGLContext setCurrentContext:context];
			
	glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer);
	glViewport(0, 0, backingWidth, backingHeight);
			
	// Clear screen
	glClear(GL_COLOR_BUFFER_BIT);

        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
			
	// Enable Texture_2D
	glEnable(GL_TEXTURE_2D);

        // Assuming OpenGL is now initialized, here goes all draw methods...
        (... draw backgrounds and all game elements here with the "renderAtPoint" method...)

	glDisable(GL_TEXTURE_2D);
	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
			
	glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer);
	[context presentRenderbuffer:GL_RENDERBUFFER_OES];
}

- (void)renderAt:(CGPoint)point texCoords:(GLfloat[])texCoords quadVertices:(GLfloat[])quadVertices{
	glPushMatrix();
	glTranslatef(point.x, point.y, 0.0f);
	glRotatef(-rotation, 0.0f, 0.0f, 1.0f);
	glScalef(scale, scale, 1.0f);

	glColor4f(colourFilter[0], colourFilter[1], colourFilter[2], colourFilter[3]);
	
	glBindTexture(GL_TEXTURE_2D, [texture name]);	
	glVertexPointer(2, GL_FLOAT, 0, quadVertices);
	glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
	
        // Only enable blending if the image have transparencies
	if (!noTransparent) {
		glEnable(GL_BLEND);
	}		

	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
	
	if (!noTransparent) {
		glDisable(GL_BLEND);
	}	

	glPopMatrix();
}

Is this what you're meaning? Sorry but I don't know much about OpenGl...
Maybe the "glPushMatrix" and the "glPopMatrix" shouldn't be called for each image?

Thanks!