objective-c - OpenGL GL_POINTS 大小

Question

如何使我的 GL_POINT 更大？我正在使用 glPointSize，但它只能工作到一定大小。所以如果我写

glPointSize(100);

大小相同

glPointSize(500);

如何使其达到我需要的大小？

Answer 1

OpenGL wiki说:

There is an implementation-defined range for point sizes, and the size given by either method is clamped to that range. You can query the range with GL_POINT_SIZE_RANGE​ (returns 2 floats). There is also a point granularity that you can query with GL_POINT_SIZE_GRANULARITY​; the implementation will clamp sizes to its granularity as needed.

如果您想要的点的大小不在允许的范围内，请考虑使用纹理四边形甚至 TRIANGLE_FAN 来制作您想要的任何大小的(接近)圆形多边形。