[Android development and learning 12] rotating glRotatef with Android OpenGL ES

Source: Internet
Author: User

1. Rotation function:

GlRotatef (float angle, float X, float Y, float Z)

Angle specifies the Rotation angle of an object. The X, Y, and Z parameters jointly determine the direction of the rotation axis.

That is, the glRotatef function rotates the angle of an object along the specified axis.


2. Rotation implementation method:

Float rotateTri;
Float rotateQuad;

// Rotate the triangle
Gl. glRotatef (rotateTri, 0.0f, 1.0f, 0.0f );
// Rotate the Quadrilateral
Gl. glRotatef (rotateQuad, 1.0f, 0.0f, 0.0f );

// In order to rotate continuously, the rotation angle needs to be constantly changed.
RotateTri + = 0.5f;
RotateQuad-= 0.5f;



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