OpenGL ES 帮助——提高 PanoramaGL 的球面分辨率？

发布于 2024-10-07 01:01:12 字数 1303 浏览 0 评论 0原文

那天晚上我开始尝试 PanoramaGL。在对下载的项目进行了一番修改之后（有一些小问题导致它无法立即编译），我让它开始工作——我加载了一张 1200 x 512（左右）的全景图像，并且球形视图工作得很好。有两个问题：我加载了太大的纹理，这使得该功能只能在 iPhone4 上运行（至少，我认为这就是它在我的 iPad 上无法运行的原因），而且全景图非常模糊。

我开始对 iPhone 上的 3D 进行一些研究，并且我并不（太）尴尬地承认大多数概念都超出了我的理解范围。我没有任何使用 3D 的经验，我希望能从 StackOverflow 的好人那里得到一些帮助。

这就是我想要做的：我想将我的全景图像分解为图块（我正在考虑垂直条，但我愿意以其他方式做到这一点）。我想将这些图块作为纹理加载到 PLSphere 视图上，并告诉它某个图块对应于某些角度。

查看 PanoramaGL 的源代码，看起来有一个放置此代码的好地方。在 PLSphere 类中，有这样的代码块

- (void)internalRender
{
    gluQuadricNormals(quadratic, GLU_SMOOTH);
    gluQuadricTexture(quadratic, true);

    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, ((PLTexture *)[textures objectAtIndex:0]).textureId);

    gluSphere(quadratic, kRatio, divs, divs);

    glDisable(GL_TEXTURE_2D);
}

：在 PLCube 中，我在其 internalRender 方法中看到以下代码：

// Front Face
glBindTexture(GL_TEXTURE_2D, ((PLTexture *)[textures objectAtIndex:kCubeFrontFaceIndex]).textureId);
glNormal3f(0.0f, 0.0f, 1.0f);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

基于此，我认为我可以指定一个方向（使用类似 glNormal3f code>) 并将图块绑定为纹理。

我走在正确的轨道上吗？我希望有人能为我提供指导，使其发挥作用。

谢谢！

原文

I started playing around with PanoramaGL the other night. After finagling with the downloaded project (there were some minor issues that prevented it from compiling right out the gate), I got it to work -- I loaded up a 1200 by 512(ish) panorama image and got the spherical view working pretty well. Two problems: I'm loading too large of a texture, which makes this work only on an iPhone4 (at least, I think that's why it didn't work on my iPad), and the panorama turned out to be pretty blurry.

I started doing a bit of studying on doing 3D on the iPhone and I'm not (too) embarrassed to admit that most of the concepts are over my head. I don't have any experience working with 3D and I'm hoping to get some help from the good folks here at StackOverflow.

Here's what I want to do: I want to break up my panorama image into tiles (I was thinking vertical strips but I'm open to doing it in other ways). I want to load these tiles as textures on the PLSphere view and tell it that a certain tile corresponds to certain angles.

Looking at the source of PanoramaGL, it looks like there'd be a good place to put this code in. In the PLSphere class, there's this block of code:

- (void)internalRender
{
    gluQuadricNormals(quadratic, GLU_SMOOTH);
    gluQuadricTexture(quadratic, true);

    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, ((PLTexture *)[textures objectAtIndex:0]).textureId);

    gluSphere(quadratic, kRatio, divs, divs);

    glDisable(GL_TEXTURE_2D);
}

And looking at PLCube, I see the following code in its internalRender method:

// Front Face
glBindTexture(GL_TEXTURE_2D, ((PLTexture *)[textures objectAtIndex:kCubeFrontFaceIndex]).textureId);
glNormal3f(0.0f, 0.0f, 1.0f);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

Based on this, I would think that I could specify a direction (using something like glNormal3f) and bind a tile as a texture.

Am I on the right track here? I'm hopeful someone can provide me with guidance to get this to work.

Thanks!

分享到QQ

分享到微博