【JOGL 3D三角形】在本节中, 我们将通过简单的示例学习如何创建三维三角形。我们还将旋转该三角形以查看其所有侧面。
J3DTriangle.java
package com.srcmini.jogl;
import javax.media.opengl.*;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.glu.GLU;
import javax.swing.JFrame;
import com.jogamp.opengl.util.FPSAnimator;
public class J3DTriangle implements GLEventListener {private GLU glu = new GLU();
private float rotation = 0.0f;
@Overridepublic void display(GLAutoDrawable drawable) {final GL2 gl = drawable.getGL().getGL2();
gl.glClear( GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT );
gl.glLoadIdentity();
// Move trianglegl.glTranslatef( -0.5f, 0.0f, -6.0f );
gl.glRotatef( rotation, 0.0f, 1.0f, 0.0f );
gl.glBegin( GL2.GL_TRIANGLES );
// Frontgl.glColor3f( 1.0f, 1.0f, 0.0f );
// Yellowgl.glVertex3f( 1.5f, 2f, 0.0f );
// Top Of Triangle gl.glColor3f( 0.0f, 1.5f, 0.0f );
// Greengl.glVertex3f( -1.5f, -1.5f, 1.5f );
// Left Of Triangle gl.glColor3f( 1.0f, 0.0f, 1.0f );
// Purplegl.glVertex3f( 1.5f, -1.5f, 1.5f );
// Right Of Triangle // Rightgl.glColor3f( 1.0f, 1.0f, 0.0f );
// Yellowgl.glVertex3f( 1.5f, 2.0f, 0.0f );
// Top Of Triangle gl.glColor3f( 1.0f, 0.0f, 1.0f );
// Purplegl.glVertex3f( 1.5f, -1.5f, 1.5f );
// Left Of Triangle gl.glColor3f( 0.0f, 1.0f, 0.0f );
// Greengl.glVertex3f( 1.5f, -1.5f, -1.5f );
// Right Of Triangle // Backgl.glColor3f( 1.0f, 1.0f, 0.0f );
// Yellowgl.glVertex3f( 1.5f, 2.0f, 0.0f );
// Top Of Triangle gl.glColor3f( 0.0f, 1.0f, 0.0f );
// Greengl.glVertex3f( 1.5f, -1.5f, -1.5f );
// Left Of Triangle gl.glColor3f( 1.0f, 0.0f, 1.0f );
// Purplegl.glVertex3f( -1.5f, -1.5f, -1.5f );
// Right Of Triangle //leftgl.glColor3f( 1.0f, 1.0f, 0.0f );
// Yellowgl.glVertex3f( 1.5f, 2.0f, 0.0f );
// Top Of Triangle gl.glColor3f( 1.0f, 0.0f, 1.0f );
// Purplegl.glVertex3f( -1.5f, -1.5f, -1.5f );
// Left Of Triangle gl.glColor3f( 0.0f, 1.0f, 0.0f );
// Greengl.glVertex3f( -1.5f, -1.5f, 1.5f );
// Right Of Triangle gl.glEnd();
gl.glFlush();
rotation += 0.6f;
}@Overridepublic void dispose( GLAutoDrawable drawable ) {//method body}@Overridepublic void init( GLAutoDrawable drawable ) {//method body}@Overridepublic void reshape( GLAutoDrawable drawable, int x, int y, int width, int height ) {final GL2 gl = drawable.getGL().getGL2();
if(height<
=0)height = 1;
final float h = ( float ) width / ( float ) height;
gl.glViewport( 0, 0, width, height );
gl.glMatrixMode( GL2.GL_PROJECTION );
gl.glLoadIdentity();
glu.gluPerspective( 45.0f, h, 1.0, 20.0 );
gl.glMatrixMode( GL2.GL_MODELVIEW );
gl.glLoadIdentity();
}public static void main( String[] args ) {final GLProfile gp = GLProfile.get( GLProfile.GL2 );
GLCapabilities cap = new GLCapabilities(gp );
final GLCanvas gc = new GLCanvas( cap );
J3DTriangle triangle = new J3DTriangle();
gc.addGLEventListener( triangle );
gc.setSize( 400, 400 );
final JFrame frame = new JFrame( "3D Triangle" );
frame.add(gc);
frame.setSize(500, 400);
frame.setVisible(true);
final FPSAnimator animator = new FPSAnimator(gc, 400, true);
animator.start();
} }输出：
文章图片
