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我在GLKit的幫助下顯示3個對象。但是，當我將紋理應用到這些對象時，所有三個紋理都只使用一個紋理。如何使用GLKit將不同的紋理應用於不同的對象？
我使用的代碼如下：
- (void)setUpGL{
NSLog(@"i : %d, %d, %d",i,j,k);
firstPlayerScore = 0;
secondPlayerScore = 0;
staticBall = YES;
isSecondPlayer = NO;
self.boxPhysicsObjects = [NSMutableArray array];
self.spherePhysicsObjects = [NSMutableArray array];
self.immovableBoxPhysicsObjects = [NSMutableArray array];
self.cylinderPhysicsObjects = [NSMutableArray array];
self.secondPlayerCylinderPhysicsObjects = [NSMutableArray array];
self.sphereArray = [NSMutableArray array];
GLKView *view = (GLKView *)self.view;
NSAssert([view isKindOfClass:[GLKView class]],@"View controller's view is not a GLKView");
view.drawableDepthFormat = GLKViewDrawableDepthFormat16;
view.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
[EAGLContext setCurrentContext:view.context];
self.baseEffect = [[GLKBaseEffect alloc] init];
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
//glGenBuffers(1, &_vertexBuffer);
//glBindBuffer(GL_ARRAY_BUFFER, _vertexBuffer);
//glBufferData(GL_ARRAY_BUFFER, (i+j)*sizeof(float), sphereVerts, GL_STATIC_DRAW);
glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
self.baseEffect.light0.enabled = GL_TRUE;
self.baseEffect.light0.ambientColor = GLKVector4Make(0.7f, 0.7f, 0.7f, 1.0f);
[self addImmovableBoxPhysicsObjects];
[self addRandomPhysicsSphereObject];
//[self addFirstPlayerCylinderObject];
//[self addSecondPlayerCylinderObject];
//[self scheduleAddRandomPhysicsSphereObject:nil];
}
- (void)addRandomPhysicsObject{
if(random() % 2 == 0)
{
[self addRandomPhysicsBoxObject];
}
else
{
[self addRandomPhysicsSphereObject];
}
}
- (void)setUpBox{
CGImageRef image = [[UIImage imageNamed:@"outUV2.PNG"] CGImage];
textureInfo1 = [GLKTextureLoader textureWithCGImage:image options:nil error:NULL];
self.baseEffect.texture2d0.name = textureInfo1.name;
self.baseEffect.texture2d0.enabled = YES;
glEnableVertexAttribArray(GLKVertexAttribPosition);
glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), final_meshVerts);
glEnableVertexAttribArray(GLKVertexAttribNormal);
glVertexAttribPointer(GLKVertexAttribNormal, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), final_meshNormals);
glEnableVertexAttribArray(GLKVertexAttribTexCoord0);
glVertexAttribPointer(GLKVertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, 2*sizeof(float), final_meshTexCoords);
//glDisableVertexAttribArray(GLKVertexAttribTexCoord0);
}
- (void)drawPhysicsBoxObjects{
//self.baseEffect.texture2d0.target = textureInfo1.target;
PAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
GLKMatrix4 savedModelviewMatrix = self.baseEffect.transform.modelviewMatrix;
for(PPhysicsObject *currentObject in self.boxPhysicsObjects){
self.baseEffect.transform.modelviewMatrix =
GLKMatrix4Multiply(savedModelviewMatrix,[appDelegate physicsTransformForObject:currentObject]);
[self.baseEffect prepareToDraw];
glDrawArrays(GL_TRIANGLES, 0, final_meshNumVerts);
}
self.baseEffect.light0.diffuseColor = GLKVector4Make(1.0f, 1.0f, 1.0f, 1.0f);// Alpha
for(PPhysicsObject *currentObject in self.immovableBoxPhysicsObjects){
self.baseEffect.transform.modelviewMatrix = GLKMatrix4Multiply(savedModelviewMatrix, [appDelegate physicsTransformForObject:currentObject]);
[self.baseEffect prepareToDraw];
glDrawArrays(GL_TRIANGLES,0, final_meshNumVerts);
}
self.baseEffect.transform.modelviewMatrix = savedModelviewMatrix;
}
- (void)glkView:(GLKView *)view drawInRect:(CGRect)rect{
static float a = 0;
a = a+0.1;
//NSLog(@"a : %f",a);
self.baseEffect.transform.modelviewMatrix = GLKMatrix4MakeLookAt(
0, 9.8, 10.0, // Eye position
0.0, 1.0, 0.0, // Look-at position
0.0, 1.0, 0.0); // Up direction
const GLfloat aspectRatio = (GLfloat)view.drawableWidth/(GLfloat)view.drawableHeight;
self.baseEffect.transform.projectionMatrix =
GLKMatrix4MakePerspective(GLKMathDegreesToRadians(35.0f),aspectRatio,0.2f,200.0f); // Far arbitrarily far enough to contain scene
self.baseEffect.light0.position = GLKVector4Make(0.6f, 1.0f, 0.4f, 0.0f);
[self.baseEffect prepareToDraw];
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
[self drawPhysicsSphereObjects];
[self drawPhysicsBoxObjects];
//[self drawPhysicsCylinderObjects];
}
- (void)addRandomPhysicsSphereObject{
PAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
PPhysicsObject *anObject = nil;
if([self.spherePhysicsObjects count] < PMAX_NUMBER_BLOCKS)
{
NSLog(@"if");
anObject = [[PPhysicsObject alloc] init];
}
else
{
NSLog(@"else");
anObject = [self.spherePhysicsObjects objectAtIndex:0];
[self.spherePhysicsObjects removeObjectAtIndex:0];
}
[self.spherePhysicsObjects addObject:anObject];
[appDelegate physicsRegisterSphereObject:anObject
position:GLKVector3Make(0,3.5,-2)
mass:0.0f];
[self setUpSphere];
/*[appDelegate physicsSetVelocity:GLKVector3Make(
random()/(float)RAND_MAX * 2.0f - 1.0f,
0.0f,
random() /(float)RAND_MAX * 2.0f - 1.0f)
forObject:anObject];*/
}
- (void)setUpSphere{
CGImageRef image = [[UIImage imageNamed:@"basketball.png"] CGImage];
textureInfo = [GLKTextureLoader textureWithCGImage:image options:nil error:NULL];
self.baseEffect.texture2d0.name = textureInfo.name;
self.baseEffect.texture2d0.enabled = YES;
glEnableVertexAttribArray(GLKVertexAttribPosition);
glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), newbasketballVerts);
glEnableVertexAttribArray(GLKVertexAttribNormal);
glVertexAttribPointer(GLKVertexAttribNormal, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), newbasketballNormals);
glEnableVertexAttribArray(GLKVertexAttribTexCoord0);
glVertexAttribPointer(GLKVertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, 2*sizeof(float), newbasketballTexCoords);
//glDisableVertexAttribArray(GLKVertexAttribTexCoord0);
}
- (void)drawPhysicsSphereObjects{
NSLog(@"draw");
/*static int x = 1;
if (x>20) {
x=20;
}
matrix = GLKMatrix4Identity;
matrix = GLKMatrix4MakeTranslation(0.1 * (x++), 0.0, 0.0);*/
//self.baseEffect.texture2d0.target = textureInfo2.target;
PAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
GLKMatrix4 savedModelviewMatrix = self.baseEffect.transform.modelviewMatrix;
/*CGImageRef image = [[UIImage imageNamed:@"basketball.png"] CGImage];
GLKTextureInfo *textureInfo = [GLKTextureLoader textureWithCGImage:image options:nil error:NULL];
self.baseEffect.texture2d0.name = textureInfo.name;
self.baseEffect.texture2d0.target = textureInfo.target;*/
self.baseEffect.light0.diffuseColor = GLKVector4Make(1.0f, 1.0f, 1.0f, 1.0f);
//glVertexPointer(3, GL_FLOAT, 0, sphereVerts);
//glNormalPointer(GL_FLOAT, 0, sphereNormals);
//glTexCoordPointer(2, GL_FLOAT, 0, final meshTexCoords);
/*glGenBuffers(1, &ballVertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, ballVertexBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(MeshVertexData), MeshVertexData, GL_STATIC_DRAW);
glEnableVertexAttribArray(GLKVertexAttribPosition);
glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, sizeof(arrowVertexData), 0);
glEnableVertexAttribArray(GLKVertexAttribNormal);
glVertexAttribPointer(GLKVertexAttribNormal, 3, GL_FLOAT, GL_TRUE, sizeof(arrowVertexData), (void *)offsetof(arrowVertexData, normal));
glBindVertexArrayOES(arrowVertexArray);*/
//glEnableVertexAttribArray(GLKVertexAttribTexCoord0);
//glVertexAttribPointer(GLKVertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, 2*sizeof(float), newbasketballTexCoords);
if (!isSecondPlayer) {
for(PPhysicsObject *currentObject in self.spherePhysicsObjects)
{NSLog(@"first");
self.baseEffect.transform.modelviewMatrix =
GLKMatrix4Multiply(savedModelviewMatrix, [appDelegate physicsTransformForObject:currentObject]);
[self.baseEffect prepareToDraw];
glDrawArrays(GL_TRIANGLES, 0, newbasketballNumVerts);
//glDrawArrays(GL_TRIANGLES, 0, sizeof(MeshVertexData)/sizeof(arrowVertexData));
}
}
else{
for(PPhysicsObject *currentObject in self.secondSpherePhysicsObjects)
{
self.baseEffect.transform.modelviewMatrix =
GLKMatrix4Multiply(savedModelviewMatrix, [appDelegate physicsTransformForObject:currentObject]);
[self.baseEffect prepareToDraw];
glDrawArrays(GL_TRIANGLES, 0, newbasketballNumVerts);
//glDrawArrays(GL_TRIANGLES, 0, sizeof(MeshVertexData)/sizeof(arrowVertexData));
}
}
//glBindBuffer(GL_ARRAY_BUFFER, 0);
//glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
//glDisableVertexAttribArray(GLKVertexAttribTexCoord0);
self.baseEffect.transform.modelviewMatrix = savedModelviewMatrix;
}
這是爲什麼只使用一個紋理所有三個，而不是三個不同的紋理，每一個對象？我怎樣才能解決這個問題？