Game Development Reference
In-Depth Information
gl.glLoadIdentity();
gl.glTranslatef(bobs[i].x, bobs[i].y, 0);
bobModel.draw(GL10.
GL_TRIANGLES
, 0, 6);
}
fpsCounter.logFrame();
}
That looks pretty much optimal, doesn't it? Well, in fact it is not optimal. First, we can also move
the
gl.glMatrixMode()
call to the
resume()
method, but that won't have a huge impact on
performance, as we've already seen. The second thing that can be optimized is a little more subtle.
We use the
Vertices
class to store and render the model of our Bobs. Remember the
Vertices.draw()
method? Here it is one more time:
public void
draw(
int
primitiveType,
int
offset,
int
numVertices) {
GL10 gl = glGraphics.getGL();
gl.glEnableClientState(GL10.
GL_VERTEX_ARRAY
);
vertices.position(0);
gl.glVertexPointer(2, GL10.
GL_FLOAT
, vertexSize, vertices);
if
if(hasColor) {
gl.glEnableClientState(GL10.
GL_COLOR_ARRAY
);
vertices.position(2);
gl.glColorPointer(4, GL10.
GL_FLOAT
, vertexSize, vertices);
}
if
(hasTexCoords) {
gl.glEnableClientState(GL10.
GL_TEXTURE_COORD_ARRAY
);
vertices.position(hasColor?6:2);
gl.glTexCoordPointer(2, GL10.
GL_FLOAT
, vertexSize, vertices);
}
if
if(indices! =
null
) {
indices.position(offset);
gl.glDrawElements(primitiveType, numVertices, GL10.
GL_UNSIGNED_SHORT
, indices);
}
else
{
gl.glDrawArrays(primitiveType, offset, numVertices);
}
if
(hasTexCoords)
gl.glDisableClientState(GL10.
GL_TEXTURE_COORD_ARRAY
);
if
if(hasColor)
gl.glDisableClientState(GL10.
GL_COLOR_ARRAY
);
}
