6

我有两张图片:

  1. PNG (sRGB) 64x64(从网络下载)
  2. PNG (sRGB),从 fla 移植到 png,然后,从 png 到 jpg 与 sRGB,然后到 PNG (sRGB)。

我正在尝试用从这张图片创建的纹理填充多边形:

CCTexture2D *texture = [[CCTextureCache sharedTextureCache] addImage:spriteName];

    polygon = [[[PhisicsFilledPoligon alloc] initWithPoints:points
                         andTexture:texture] autorelease];

PhysicsFilledPolygon 是 box2d 的一种 PhysicsSprite,但覆盖了“draw”方法:

-(void) draw 
{
    ccGLBindTexture2D( [self.texture name] );

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position | kCCVertexAttribFlag_TexCoords );

    [prog use];
    [prog setUniformForModelViewProjectionMatrix];

    glVertexAttribPointer(kCCVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, sizeof(CGPoint), areaTrianglePoints);
    glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, sizeof(CGPoint), textureCoordinates);

    glDrawArrays(GL_TRIANGLES, 0, areaTrianglePointCount);
}

当我尝试使用第一张图像作为纹理时,一切正常。但由于我使用的是第二个,应用程序崩溃并出现错误:

*** Assertion failure in -[CCTexture2D setTexParameters:], /Users/SentineL/Documents/squirrels ios/squirrels/libs/cocos2d/CCTexture2D.m:743
2012-05-18 14:42:26.603 squirrels[21436:707] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'GL_CLAMP_TO_EDGE should be used in NPOT textures'

无论我尝试使用什么图像,结果都是相同的错误。Cocos2d 版本是 2.0 rc0。这是开始 cocos2d 的信息:

2012-05-18 14:42:25.038 squirrels[21436:707] cocos2d: OS version: 5.1 (0x05010000)
2012-05-18 14:42:25.041 squirrels[21436:707] cocos2d: GL_VENDOR:   Imagination Technologies
2012-05-18 14:42:25.042 squirrels[21436:707] cocos2d: GL_RENDERER: PowerVR SGX 543
2012-05-18 14:42:25.044 squirrels[21436:707] cocos2d: GL_VERSION:  OpenGL ES 2.0 IMGSGX543-63.24
2012-05-18 14:42:25.047 squirrels[21436:707] cocos2d: GL_MAX_TEXTURE_SIZE: 4096
2012-05-18 14:42:25.048 squirrels[21436:707] cocos2d: GL_MAX_TEXTURE_UNITS: 8
2012-05-18 14:42:25.049 squirrels[21436:707] cocos2d: GL_MAX_SAMPLES: 4
2012-05-18 14:42:25.051 squirrels[21436:707] cocos2d: GL supports PVRTC: YES
2012-05-18 14:42:25.053 squirrels[21436:707] cocos2d: GL supports BGRA8888 textures: YES
2012-05-18 14:42:25.054 squirrels[21436:707] cocos2d: GL supports NPOT textures: YES
2012-05-18 14:42:25.056 squirrels[21436:707] cocos2d: GL supports discard_framebuffer: YES
2012-05-18 14:42:25.057 squirrels[21436:707] cocos2d: compiled with Profiling Support: NO

2012-05-18 14:42:25.059 squirrels[21436:707] cocos2d: **** WARNING **** CC_ENABLE_GL_STATE_CACHE is disabled. To improve performance, enable it by editing ccConfig.h

2012-05-18 14:42:25.061 squirrels[21436:707] cocos2d: cocos2d v2.0.0-rc0
2012-05-18 14:42:25.063 squirrels[21436:707] cocos2d: Using Director Type:CCDirectorDisplayLink
2012-05-18 14:42:25:201 squirrels[21436:707] Retina Display Not supported
2012-05-18 14:42:25.214 squirrels[21436:707] cocos2d: animation started with frame interval: 60.00
2012-05-18 14:42:25.234 squirrels[21436:707] cocos2d: surface size: 1024x768

我的问题在哪里?

4

4 回答 4

11

您正在使用具有非二维幂的纹理。

于 2012-05-18T11:23:00.710 回答
9

我认为问题在于:

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

GL_REPEAT 不是用于 NPOT 纹理的核心 OpenGL ES 2.0 规范的一部分,只有 GL_CLAMP_TO_EDGE 是,因此不支持 GL_REPEAT。

您基本上需要设置 GL_CLAMP_TO_EDGE 而不是 GL_REPEAT,或者使用 POT 纹理。

于 2012-05-23T15:21:40.297 回答
2

将 GL_REPEAT 切换为 GL_CLAMP_TO_EDGE 会消除错误并在我的项目中再次构建,但我失去了重复效果。升级到 Cocos2d 2.x 后我必须这样做。最好的选择,只需将图像尺寸设为 2 的幂...(2、4、8、16、32、64、128、256、512、1024、2048)

于 2012-06-12T18:39:04.190 回答
0

神奇的词是:CCConfiguration.m://在第 122 行附近

supportsNPOT_ = NO; // before it said YES
于 2015-10-16T08:25:24.730 回答