Android OpenGL ES point sprite texture image was up-down inverted

Question

I draw texture images using glDrawArrays(GL_POINTS, 0, PARTICLE_NUMBER) in android, then rend it to screen.

In some phones the image was up-down inverted. Seems that there is no command GL_POINT_SPRITE_COORD_ORIGIN in OpenGL ES.

Is there any other way I can fix it?

score 0 · Answer 1 · answered Jun 02 '16 at 10:41

0

For OpenGL ES 2.0, you can use gl_PointCoord in the fragment shaders to get the texture coordinates.

answered Jun 02 '16 at 10:41

codetiger

score 0 · Answer 2 · answered Jun 02 '16 at 22:14

0

Is there any other way I can fix it?

Render it as triangles.

answered Jun 02 '16 at 22:14

solidpixel

2 Answers2