在3D世界中渲染2D精灵? [英] Rendering 2D sprites in a 3D world?

问题描述

鉴于我拥有精灵的png，如何在OpenGL中渲染2D精灵?请参阅图像作为我想要达到的效果的示例.我也想在屏幕上覆盖武器，如底部图像中的步枪.有谁知道我将如何实现这两种效果?任何帮助是极大的赞赏.

How do I render 2D sprites in OpenGL given that I have a png of the sprite? See images as an example of the effect I'd like to achieve. Also I would like to overlay weapons on the screen like the rifle in the bottom image. Does anyone know how I would achieve the two effects? Any help is greatly appreciated.

推荐答案

在3D术语中，这称为广告牌".广告牌是完全平面的2D平面，上面带有纹理，并且始终面向摄像机.

In 3D terms, this is called a "billboard". A billboard is completely flat 2D plane with a texture on it and it always faces the camera.

有关纯OpenGL实现，请参见此处: http://nehe. gamedev.net/data/articles/article.asp?article=19

See here for a pure OpenGL implementation: http://nehe.gamedev.net/data/articles/article.asp?article=19

默认情况下，几乎所有3D引擎都应该能够做到.例如，Ogre3D可以做到.

Just about any 3D engine should be able to do them by default. Ogre3D can do it, for instance.

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