Ios 带SKTexture的CIFilter(CIStripesGenerator)?
我正在尝试使用CIFilter生成一个条带,然后从中创建一个SKTexture。 这是我的密码Ios 带SKTexture的CIFilter(CIStripesGenerator)?,ios,sprite-kit,skspritenode,cifilter,sktexture,Ios,Sprite Kit,Skspritenode,Cifilter,Sktexture,我正在尝试使用CIFilter生成一个条带,然后从中创建一个SKTexture。 这是我的密码 CIFilter *filter = [CIFilter filterWithName:@"CIStripesGenerator"]; [filter setDefaults]; [filter setValue:[CIColor colorWithRed:1 green:1 blue:1] forKey:@"inputColor0"]; [filter setVa
CIFilter *filter = [CIFilter filterWithName:@"CIStripesGenerator"];
[filter setDefaults];
[filter setValue:[CIColor colorWithRed:1 green:1 blue:1] forKey:@"inputColor0"];
[filter setValue:[CIColor colorWithRed:0 green:0 blue:0] forKey:@"inputColor1"];
//updated the code, whith this line
//stil the same problem
CIImage *croppedImage = [filter.outputImage imageByCroppingToRect:CGRectMake(0, 0, 320, 480)];
SKTexture *lightTexture = [SKTexture textureWithImage:[UIImage imageWithCIImage:croppedImage]];
SKSpriteNode *light = [SKSpriteNode spriteNodeWithTexture:lightTexture size:self.size];
但是,我在最后一行收到一个运行时错误,如果有任何帮助,我们将不胜感激,除了(lldb),编译器不会给出更多的解释
更新:
感谢rickster指导我找到解决方案
-(UIImage*) generateImage {
// 1
CIContext *context = [CIContext contextWithOptions:nil];
CIFilter *filter = [CIFilter filterWithName:@"CIStripesGenerator"];
[filter setDefaults];
[filter setValue:[CIColor colorWithRed:1 green:1 blue:1] forKey:@"inputColor0"];
[filter setValue:[CIColor colorWithRed:0 green:0 blue:0] forKey:@"inputColor1"];
// 2
CGImageRef cgimg =
[context createCGImage:filter.outputImage fromRect:CGRectMake(0, 0, 320, 480)];
// 3
UIImage *newImage = [UIImage imageWithCGImage:cgimg];
// 4
CGImageRelease(cgimg);
return newImage;
}
然后,我可以从图像创建纹理:
SKTexture *stripesTexture = [SKTexture textureWithImage:[self generateImage]];
SKSpriteNode *stripes = [SKSpriteNode spriteNodeWithTexture:stripesTexture];
stripes.position=CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
[self addChild: stripes];
这里有几个问题:
CIContext *context = [CIContext contextWithOptions:nil];
这可能无法提供实时渲染性能。但看起来你只想一次性生成一个静态纹理,所以没关系CGImageRef
生成一个SKTexture
(lldb)是lldb调试器的提示,您可以在其中输入命令以分析程序的当前状态。这在执行停止时始终可见。日志中有更多信息,请检查上面的行(lldb)并将它们发布到此处。另外:添加异常断点:我添加了断点,但仍然没有对错误的描述。下面是一个屏幕截图,显示了正在发生的事情。正如你所解释的,我裁剪了图案,但我不确定在哪里添加上下文。