Manual de Apoio 2010

v1ctrlPoints . add ( -4f, 0f, 0f); // Start (u1)ctrlPoints . add ( -2f, 4f, 0f); // Control (u1)ctrlPoints . add (4f, 0f, 0f); // End (u1)// v2ctrlPoints . add ( -4f, 0f, -4f); // Start (u2)ctrlPoints . add ( -2f, 4f, -4f); // Control (u2)ctrlPoints . add (4f, 0f, -4f); // End (u2)}public void display ( GLAutoDrawable drawable ) {GL2 gl = drawable . getGL (). getGL2 ();gl. glClear ( GL2 . GL_COLOR_BUFFER_BIT );}float umin = 0f; // Valor minimo do ufloat umax = 10f; // Valor maximo do ufloat vmin = 0f; // Valor minimo do vfloat vmax = 10f; // Valor maximo do vgl. glMap2f (GL2 . GL_MAP2_VERTEX_3 , // Tipo de dados geradosumin , // Valor minimo do uumax , // Valor maximo do u3, // Distancia entre pontos ( dominio u)3, // Numero de pontos de controlo ( dominio u)vmin , // Valor minimo do vvmax , // Valor maximo do v9, // Distancia entre pontos ( dominio v)3, // Numero de pontos de controlo ( dominio v)ctrlPoints . toFloatBuffer () // FloatBuffer contendo pontos de controlo);// Activar o Evaluatorgl. glEnable ( GL2 . GL_MAP2_VERTEX_3 );// Desenhar os vertices da superficiegl. glColor3f (0f, 0f, 0f);gl. glMapGrid2d (10 , umin , umax , 10 , vmin , vmax );gl. glEvalMesh2 ( GL2 . GL_LINE , ( int )umin , ( int )umax , ( int )vmin , ( int ) vmax );// Desenhar Pontos de Contrologl. glPointSize (5.0 f);gl. glColor3f (1f, 0f, 0f);gl. glBegin ( GL2 . GL_POINTS );for ( GLVector point : ctrlPoints )point . draw ();gl. glEnd ();gl. glPopMatrix ();@Overridepublic void reshape ( GLAutoDrawable drawable , int x, int y, int width , int height ) {GL2 gl = drawable . getGL (). getGL2 ();if ( height == 0)height = 1; // prevenir divisao por 0gl. glViewport (0 , 0, canvas . getSize (). width , canvas . getSize (). height );gl. glMatrixMode ( GL2 . GL_PROJECTION );gl. glLoadIdentity ();float volume = 100 f;float fAspect = ( float ) width / ( float ) height ;143