/**
* Render the arrow as a line and a _head.
*
* @param gl OpenGL Context
*/
public void render(GL2 gl) {
// save Light Attributes and remove lighting to get "full" RGB colors
// gl.glPushAttrib( GL2.GL_LIGHTING_BIT );
gl.glPushAttrib(GL2.GL_ENABLE_BIT);
gl.glDisable(GL2.GL_LIGHTING);
if (_fg_verb) {
System.out.println(
"Arrow pos="
+ _pos.toString()
+ " angZ1="
+ _angZ1
+ " angY2="
+ _angY2
+ " length="
+ _length);
_fg_verb = false;
}
// save transformation matrix, then translate and scale.
gl.glPushMatrix();
gl.glTranslatef(_pos.x, _pos.y, _pos.z);
gl.glRotatef(Matrix.rad2Deg(_angZ1), 0, 0, 1); // rotation around 0z
gl.glRotatef(Matrix.rad2Deg(_angY2), 0, 1, 0); // rotation around 0y
// draw line
gl.glColor4f(_color_fg.x, _color_fg.y, _color_fg.z, _color_fg.w);
gl.glLineWidth(1.0f);
gl.glBegin(GL.GL_LINES);
{
gl.glVertex3f(0, 0, 0);
gl.glVertex3f(_length, 0, 0);
}
gl.glEnd();
// draw head
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL2GL3.GL_FILL);
gl.glTranslatef(_length, 0, 0);
gl.glBegin(GL.GL_TRIANGLES);
{
for (float[] face : _head_faces) {
gl.glVertex3f(face[0], face[1], face[2]);
gl.glVertex3f(face[3], face[4], face[5]);
gl.glVertex3f(face[6], face[7], face[8]);
}
}
gl.glEnd();
// restore transformation matrix
gl.glPopMatrix();
// restore attributes
gl.glPopAttrib();
}
