/**
* Issue ogl commands needed for this renderable object.
*
* @param gl The gl context to draw with
*/
@Override
public void render(GL2 gl) {
// No coordinates, do nothing.
if ((vertexFormat & COORDINATE_MASK) == 0) return;
setVertexState(gl);
if ((vertexFormat & EDGES) != 0) {
gl.glEnableClientState(GL2.GL_EDGE_FLAG_ARRAY);
gl.glEdgeFlagPointer(0, edgeBuffer);
}
gl.glDrawArrays(GL2.GL_QUADS, 0, numCoords);
if ((vertexFormat & EDGES) != 0) {
gl.glDisableClientState(GL2.GL_EDGE_FLAG_ARRAY);
gl.glEdgeFlag(true);
}
clearVertexState(gl);
}
/**
* //! Draw an x-y-z frame.
*
* @param aAxisLengthScale
* @param aAxisThicknessScale
* @param aModifyMaterialState
*/
public static void jDrawFrame(
final double aAxisLengthScale,
final double aAxisThicknessScale,
final boolean aModifyMaterialState) {
// Triangle vertices:
int nTriangles = 8;
// Quad vertices:
int nQuads = 16;
GL2 gl = GLContext.getCurrent().getGL().getGL2();
// set material properties
float[] fnull = {0, 0, 0, 0};
gl.glMaterialfv(GL2.GL_FRONT_AND_BACK, GL2.GL_SPECULAR, fnull, 0);
gl.glMaterialfv(GL2.GL_FRONT_AND_BACK, GL2.GL_EMISSION, fnull, 0);
gl.glColorMaterial(GL2.GL_FRONT_AND_BACK, GL2.GL_AMBIENT_AND_DIFFUSE);
gl.glEnable(GL2.GL_COLOR_MATERIAL);
gl.glPolygonMode(GL2.GL_FRONT_AND_BACK, GL2.GL_FILL);
// enable vertex and normal arrays
gl.glEnableClientState(GL2.GL_NORMAL_ARRAY);
gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
if (aModifyMaterialState) {
gl.glEnable(GL2.GL_COLOR_MATERIAL);
gl.glColorMaterial(GL2.GL_FRONT, GL2.GL_AMBIENT_AND_DIFFUSE);
gl.glPolygonMode(gl.GL_FRONT_AND_BACK, gl.GL_FILL);
}
for (int k = 0; k < 3; k++) {
gl.glPushMatrix();
// Rotate to the appropriate axis
if (k == 0) {
gl.glRotatef(-90.0f, 0, 1, 0);
gl.glColor3f(1.0f, 0.0f, 0.0f);
} else if (k == 1) {
gl.glRotatef(90.0f, 1, 0, 0);
gl.glColor3f(0.0f, 1.0f, 0.0f);
} else {
gl.glRotatef(180.0f, 1, 0, 0);
gl.glColor3f(0.0f, 0.0f, 1.0f);
}
// scaling
gl.glScaled(aAxisThicknessScale, aAxisThicknessScale, aAxisLengthScale);
// render frame object
gl.glVertexPointer(3, GL2.GL_FLOAT, 0, triVerticesBuffer);
gl.glNormalPointer(GL2.GL_FLOAT, 0, triNormalsBuffer);
gl.glDrawArrays(GL2.GL_TRIANGLES, 0, nTriangles * 3);
gl.glVertexPointer(3, GL2.GL_FLOAT, 0, quadVerticesBuffer);
gl.glNormalPointer(GL2.GL_FLOAT, 0, quadNormalsBuffer);
gl.glDrawArrays(GL2.GL_QUADS, 0, nQuads * 4);
gl.glPopMatrix();
}
// disable vertex and normal arrays
gl.glDisableClientState(GL2.GL_NORMAL_ARRAY);
gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);
}