I have been following with the famous create a Tiny Wings game clone tutorial. The tutorial was written for IOS and I have done some porting to get some things working correctly. For some reason I can't get the stripes to work! Can someone look at my code and tell me what is IOS specific, I couldn't figure out why stripes won't generate, the code works perfectly on IOS (besides the event handling stuff)
Here is my code:
+(CCScene *) scene
{
CCScene *scene = [CCScene node];
HelloWorldLayer *layer = [HelloWorldLayer node];
[scene addChild: layer];
return scene;
}
-(CCSprite *)spriteWithColor:(ccColor4F)bgColor textureSize:(float)textureSize {
// 1: Create new CCRenderTexture
CCRenderTexture *rt = [CCRenderTexture renderTextureWithWidth:textureSize height:textureSize];
// 2: Call CCRenderTexture:begin
[rt beginWithClear:bgColor.r g:bgColor.g b:bgColor.b a:bgColor.a];
// 3: Draw into the texture
glDisable(GL_TEXTURE_2D);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
float gradientAlpha = 0.7;
CGPoint vertices[4];
ccColor4F colors[4];
int nVertices = 0;
vertices[nVertices] = CGPointMake(0, 0);
colors[nVertices++] = (ccColor4F){0, 0, 0, 0 };
vertices[nVertices] = CGPointMake(textureSize, 0);
colors[nVertices++] = (ccColor4F){0, 0, 0, 0};
vertices[nVertices] = CGPointMake(0, textureSize);
colors[nVertices++] = (ccColor4F){0, 0, 0, gradientAlpha};
vertices[nVertices] = CGPointMake(textureSize, textureSize);
colors[nVertices++] = (ccColor4F){0, 0, 0, gradientAlpha};
glVertexPointer(2, GL_FLOAT, 0, vertices);
glColorPointer(4, GL_FLOAT, 0, colors);
glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnable(GL_TEXTURE_2D);
CCSprite *noise = [CCSprite spriteWithFile:@"Noise.png"];
[noise setBlendFunc:(ccBlendFunc){GL_DST_COLOR, GL_ZERO}];
noise.position = ccp(textureSize/2, textureSize/2);
[noise visit];
// 4: Call CCRenderTexture:end
[rt end];
// 5: Create a new Sprite from the texture
return [CCSprite spriteWithTexture:rt.sprite.texture];
}
-(CCSprite *)stripedSpriteWithColor1:(ccColor4F)c1 color2:(ccColor4F)c2 textureSize:(float)textureSize stripes:(int)nStripes {
// 1: Create new CCRenderTexture
CCRenderTexture *rt = [CCRenderTexture renderTextureWithWidth:textureSize height:textureSize];
// 2: Call CCRenderTexture:begin
[rt beginWithClear:c1.r g:c1.g b:c1.b a:c1.a];
// 3: Draw into the texture
// Layer 1: Stripes
glDisable(GL_TEXTURE_2D);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
CGPoint vertices[nStripes*6];
int nVertices = 0;
float x1 = -textureSize;
float x2;
float y1 = textureSize;
float y2 = 0;
float dx = textureSize / nStripes * 2;
float stripeWidth = dx/2;
for (int i=0; i<nStripes; i++) {
x2 = x1 + textureSize;
vertices[nVertices++] = CGPointMake(x1, y1);
vertices[nVertices++] = CGPointMake(x1+stripeWidth, y1);
vertices[nVertices++] = CGPointMake(x2, y2);
vertices[nVertices++] = vertices[nVertices-2];
vertices[nVertices++] = vertices[nVertices-2];
vertices[nVertices++] = CGPointMake(x2+stripeWidth, y2);
x1 += dx;
}
glColor4f(c2.r, c2.g, c2.b, c2.a);
glVertexPointer(2, GL_FLOAT, 0, vertices);
glDrawArrays(GL_TRIANGLES, 0, (GLsizei)nVertices);
// layer 2: gradient
glEnableClientState(GL_COLOR_ARRAY);
float gradientAlpha = 0.7;
ccColor4F colors[4];
nVertices = 0;
vertices[nVertices] = CGPointMake(0, 0);
colors[nVertices++] = (ccColor4F){0, 0, 0, 0 };
vertices[nVertices] = CGPointMake(textureSize, 0);
colors[nVertices++] = (ccColor4F){0, 0, 0, 0};
vertices[nVertices] = CGPointMake(0, textureSize);
colors[nVertices++] = (ccColor4F){0, 0, 0, gradientAlpha};
vertices[nVertices] = CGPointMake(textureSize, textureSize);
colors[nVertices++] = (ccColor4F){0, 0, 0, gradientAlpha};
glVertexPointer(2, GL_FLOAT, 0, vertices);
glColorPointer(4, GL_FLOAT, 0, colors);
glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices);
// layer 3: top highlight
float borderWidth = textureSize/16;
float borderAlpha = 0.3f;
nVertices = 0;
vertices[nVertices] = CGPointMake(0, 0);
colors[nVertices++] = (ccColor4F){1, 1, 1, borderAlpha};
vertices[nVertices] = CGPointMake(textureSize, 0);
colors[nVertices++] = (ccColor4F){1, 1, 1, borderAlpha};
vertices[nVertices] = CGPointMake(0, borderWidth);
colors[nVertices++] = (ccColor4F){0, 0, 0, 0};
vertices[nVertices] = CGPointMake(textureSize, borderWidth);
colors[nVertices++] = (ccColor4F){0, 0, 0, 0};
glVertexPointer(2, GL_FLOAT, 0, vertices);
glColorPointer(4, GL_FLOAT, 0, colors);
glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA);
glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices);
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnable(GL_TEXTURE_2D);
// Layer 2: Noise
CCSprite *noise = [CCSprite spriteWithFile:@"Noise.png"];
[noise setBlendFunc:(ccBlendFunc){GL_DST_COLOR, GL_ZERO}];
noise.position = ccp(textureSize/2, textureSize/2);
[noise visit];
// 4: Call CCRenderTexture:end
[rt end];
// 5: Create a new Sprite from the texture
return [CCSprite spriteWithTexture:rt.sprite.texture];
}
- (ccColor4F)randomBrightColor {
while (true) {
float requiredBrightness = 192;
ccColor4B randomColor =
ccc4(arc4random() % 255,
arc4random() % 255,
arc4random() % 255,
255);
if (randomColor.r > requiredBrightness ||
randomColor.g > requiredBrightness ||
randomColor.b > requiredBrightness) {
return ccc4FFromccc4B(randomColor);
}
}
}
- (void)genBackground {
[_background removeFromParentAndCleanup:YES];
ccColor4F bgColor = [self randomBrightColor];
ccColor4F color2 = [self randomBrightColor];
//_background = [self spriteWithColor:bgColor textureSize:512];
int nStripes = ((arc4random() % 4) + 1) * 2;
_background = [self stripedSpriteWithColor1:bgColor color2:color2 textureSize:512 stripes:nStripes];
self.scale = 0.5;
CGSize winSize = [CCDirector sharedDirector].winSize;
_background.position = ccp(winSize.width/2, winSize.height/2);
ccTexParams tp = {GL_LINEAR, GL_LINEAR, GL_REPEAT, GL_REPEAT};
[_background.texture setTexParameters:&tp];
[self addChild:_background];
}
-(id) init {
if((self=[super init])) {
[self genBackground];
self.isMouseEnabled = YES;
[self scheduleUpdate];
}
return self;
}
- (void)update:(ccTime)dt {
float PIXELS_PER_SECOND = 100;
static float offset = 0;
offset += PIXELS_PER_SECOND * dt;
CGSize textureSize = _background.textureRect.size;
[_background setTextureRect:CGRectMake(offset, 0, textureSize.width, textureSize.height)];
}
-(BOOL)ccMouseDown:(NSEvent *)event{
[self genBackground];
return YES;
}Where is the IOS specific code so I can fix it and get to drawing the stripes?
Thanks!
