iphone - 不能用香蕉代替茶壶

我从http://heikobehrens.net/2009/08/27/obj2opengl/下载banana.h文件。我在EAGLView.mm中包含了.h文件。我替换为EAGLView.mm文件。我按照说明用另一种3D模式替换茶壶。但是我没有任何替换输出。我不知道我在哪里弄错了

namespace {
    // Teapot texture filenames
    const char* textureFilenames[] = {
    "banana.jpg",
    /*

    "TextureTeapotBrass.png",
    "TextureTeapotBlue.png",
    "TextureTeapotRed.png"
    */
    }

    // Model scale factor
    const float kObjectScale = 3.0f;
}

- (void) setup3dObjects
{
    // build the array of objects we want drawn and their texture
    // in this example we have 3 targets and require 3 models
    // but using the same underlying 3D model of a teapot, differentiated
    // by using a different texture for each

    for (int i=0; i < [textures count]; i++)
    {
        Object3D *obj3D = [[Object3D alloc] init];
    //  obj3D.numVertices = NUM_TEAPOT_OBJECT_VERTEX;

        obj3D.numVertices =bananaNumVerts;
        obj3D.vertices = bananaVerts;
        obj3D.normals = bananaNormals;
        obj3D.texCoords = bananaTexCoords;
        obj3D.numIndices = 0;
        obj3D.indices = nil;
        obj3D.texture = [textures objectAtIndex:i];

        [objects3D addObject:obj3D];
        [obj3D release];
    }
}

在renderFrame中替换为：

glVertexPointer(3, GL_FLOAT, 0, bananaVerts);
glNormalPointer(GL_FLOAT, 0, bananaNormals);
glTexCoordPointer(2, GL_FLOAT, 0, bananaTexCoords);
glDrawArrays(GL_TRIANGLES, 0, bananaNumVerts);

我在哪里弄错了？

最佳答案

您的代码是正确的。尝试增加比例尺大小，因为您的模型可能很小。更改

const float kObjectScale = 50.0f; // Scale up

并且也使用.png格式的纹理。

关于iphone - 不能用香蕉代替茶壶，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19312941/