Manual de Apoio 2010

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ctrlPoints . size () , // Numero de pontos de controloctrlPoints . toFloatBuffer () // FloatBuffer contendo pontos de controlo);// Activar o Evaluatorgl. glEnable ( GL2 . GL_MAP1_VERTEX_3 );// Desenhar os vertices da curva/*gl. glColor3f (0f, 0f, 0f);gl. glBegin ( GL2 . GL_LINE_STRIP );for ( float i= umin ; i< umax ; i ++)gl. glEvalCoord1f (i);gl. glEnd ();*/gl. glColor3f (0f, 0f, 0f);gl. glMapGrid1d (100 , umin , umax );gl. glEvalMesh1 ( GL2 . GL_LINE , ( int )umin , ( int ) umax );// 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 ();}@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 ();glu . gluOrtho2D ( -10f, 10f, -10f, 10f);}gl. glMatrixMode ( GL2 . GL_MODELVIEW );gl. glLoadIdentity ();}C.8 Bezier3D.javapackagept.ipb . esact .cg. examples .c9;import java . awt . BorderLayout ;import java . awt . Container ;import javax . media . opengl . GL2 ;import javax . media . opengl . GLAutoDrawable ;import javax . media . opengl . GLEventListener ;import javax . media . opengl . awt . GLCanvas ;import javax . media . opengl . glu . GLU ;import javax . swing . JFrame ;import pt.ipb . esact .cg.gl. CGEngine ;import pt.ipb . esact .cg.gl. GLVector ;141
import pt.ipb . esact .cg.gl. GLVectorList ;import com . jogamp . opengl . util . FPSAnimator ;@SuppressWarnings (" serial ")public class Bezier3D extends JFrame implements GLEventListener {private GLU glu = new GLU ();private GLCanvas canvas ;FPSAnimator animator ;private GLVectorList ctrlPoints ;private GLVector lookAt = new GLVector (0f, .5f, 0f);private CGEngine e;public static void main ( String [] args ) {new Bezier3D ();}public Bezier3D () {super (" Modelo OpenGL ");setDefaultCloseOperation ( JFrame . EXIT_ON_CLOSE );setSize (600 , 600);Container p = getContentPane ();BorderLayout l = new BorderLayout (5 , 5);p. setLayout (l);canvas = new GLCanvas ();p. add ( canvas , BorderLayout . CENTER );canvas . addGLEventListener ( this );GLVector location = new GLVector (5f, .5f, 5f);e = new CGEngine ( canvas , location );e. camera (). lookAt ( lookAt );setVisible ( true );canvas . requestFocus ();}animator = new FPSAnimator ( canvas , 25);animator . start ();@Overridepublic void dispose ( GLAutoDrawable drawable ) {}@Overridepublic void init ( GLAutoDrawable drawable ) {GL2 gl = drawable . getGL (). getGL2 ();// Grayish backgroundgl. glClearColor (.5f, .5f, .5f, .5f);// Definir Pontos de ControloctrlPoints = new GLVectorList ();// v0ctrlPoints . add ( -4f, 0f, 4f); // Start (u0)ctrlPoints . add ( -2f, 4f, 4f); // Control (u0)ctrlPoints . add (4f, 0f, 4f); // End (u0)142
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Computação GráficaManual de Apoi
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4.3.5 Regras na Criação de Políg
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ConvençõesNa medida dos possívei
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1.2 Efeitos 3DUma palavra a ter em
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Figura 1.3: Duas perspectivas difer
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1.3.5 Viewport TransformationsNo fi
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Figura 2.2: Duas zonas de clipping
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Figura 2.7: O clipping volume de um
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Tipo Interno OpenGL Tipo em C Sufix
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O passo final consiste no mapeament
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Figura 3.7: Duas Esferasgl. glTrans
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Figura 3.11: FrustrumA definição
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Capítulo 4Primitivas Geométricas
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Figura 4.3: Explicação da espiral
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Figura 4.5: Desenho com GL LINESFig
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float y, curwidth = widths [0];gl.
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gl. glVertex2f (0f, 0f); // V 0gl.
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4.3.2 Tiras de Quadrados:GL QUAD ST
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4.3.5 Regras na Criação de Políg
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GL2 gl = drawable . getGL (). getGL
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A luz vista como uma partículaA co
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5.2 Utilização de Cores no OpenGL
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5.3 Cores no Mundo RealO shading do
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Ao desenhar objectos, o OpenGL deci
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Figura 5.15: Polígono após defini
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Vectores Normais às SuperfíciesO
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Figura 5.21: Um vector normal não
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classe GLVector fornece o método t
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(a) Normais perpendiculares a cada
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Capítulo 6Cores e Materiais (Conti
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Desenhar um Torus Verdegl. glColor4
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Da mesma forma que deifinimos a fun
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Figura 6.6: NevoeiroA configuraçã
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OperationGL ACCUMGL LOADGL MULTGL A
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Capítulo 7Imagens no OpenGL7.1 Bit
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transformados em fragmentos (pixel)
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Figura 7.4: Utilização de glDrawP
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7.4 Outras Operações com ImagensP
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EmbossA matriz utilizada para o efe
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Capítulo 8Mapeamento de TexturasNa
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Figura 8.2: Pipeline - Carregamento
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(a) Textura bi-dimensional aplicada
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8.4 Texture EnvironmentNo exemplo P
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8.5.2 Texture WrapNormalmente espec
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imagem da textura. A biblioteca GLU
Page 91 and 92: Capítulo 9Mapeamento de Texturas:
Page 93 and 94: Fazer o bind do estado da textura a
Page 95 and 96: Onde x, y, z e w são as coordenada
Page 97 and 98: Figura 9.6: Sphere MapFigura 9.7: C
Page 99 and 100: O valor utilizado no primeiro argum
Page 101 and 102: Capítulo 10Curvas e Superfícies10
Page 103 and 104: 10.1.2 Desenho de Superfícies Quá
Page 105 and 106: (a) inner=0(b) inner=0.25Figura 10.
Page 107 and 108: A curva da Figura 10.10b é uma cur
Page 109 and 110: Figura 10.12: Curva de Bézier 2D10
Page 111 and 112: Figura 10.14: Superfície de Bézie
Page 113 and 114: Desenhar Geometria (3)gl. glEndList
Page 115 and 116: Apêndice BTabelasB.1 Formato de Im
Page 117 and 118: Apêndice CCódigo FonteC.1 Example
Page 119 and 120: gl. glPushMatrix ();gl. glLightfv (
Page 121 and 122: public void init ( GLAutoDrawable d
Page 123 and 124: Reverter as ( possiveis ) transform
Page 125 and 126: Activar as Luzesgl. glEnable ( GL2
Page 127 and 128: gl. glTexCoord2f (0f, 0f);cBackRigh
Page 129 and 130: @Overridepublic void dispose ( GLAu
Page 131 and 132: }}return img ;@Overridepublic void
Page 133 and 134: private float fLowLight [] = { 0.25
Page 135 and 136: Carregar e Ler a imagem para a noss
Page 137 and 138: gl. glBindTexture ( GL2 . GL_TEXTUR
Page 139 and 140: }private void setupLight ( GL2 gl)
Page 141: public class Bezier2D extends JFram
Page 145 and 146: }glu . gluPerspective (100f, fAspec
Page 147 and 148: ctrlPoints . add (4f, 0f, 0f); // E
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Manual de Apoio 2010

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