CODEWITHSUNDEEP
androidopengl-es
Muteking
Muteking

Reputation: 1513

Opengles glViewport parameters

According to the documentation here, the first two parameters of this function (found in every hello Triangle example for Android)

GLES20.glViewport(0, 0, width, height);

stand for the lower left of the screen. How is it possible? Souldn't Gl coordinates have there -1,-1?

Upvotes: 1

Views: 698

Answers (1)

datenwolf
datenwolf

Reputation: 162164

The purpose of glViewport is to establish a relation between OpenGL NDC coordinates (that are coordinates after the whole coordinate transformation pipeline has been passed) and a rectangle in pixel coordinates in the target framebuffer.

Upvotes: 4

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