我正在尝试使聚光灯工作，但没有出现，有人可以看一下，看看我出了什么问题吗？
package water3;
import Common.TextureReader;
import com.sun.opengl.util.BufferUtil;
import java.io.IOException;
import javax.media.opengl.glu.GLUquadric;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import javax.media.opengl.glu.GLU;
class Renderer implements GLEventListener {
private GLUquadric quadric;
private Object3D object3D;
private float[] LightPos = {0.0f, 5.0f, -4.0f, 1.0f}; // Light Position
private boolean LightUp, LightDown, LightLeft, LightRight, LightForward, LightBackward;
private int[] textures = new int[3]; // Storage For 3 Textures
double aNum = 1;
private boolean aDown =false;
private boolean up =false;
private GLU glu = new GLU();
public void init(GLAutoDrawable drawable) {
GL gl = drawable.getGL();
try {
loadGLTextures(drawable);
} catch (IOException e) {
System.out.println("Couldn't load model/Texture");
throw new RuntimeException(e);
}
/*
gl.glShadeModel(GL.GL_SMOOTH); // Enable Smooth Shading
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background
gl.glClearDepth(1.0f); // Depth Buffer Setup
gl.glClearStencil(0); // Stencil Buffer Setup
gl.glEnable(GL.GL_DEPTH_TEST); // Enables Depth Testing
gl.glDepthFunc(GL.GL_LEQUAL); // The Type Of Depth Testing To Do
gl.glHint(GL.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST); // Really Nice Perspective Calculations
/* gl.glLightfv(GL.GL_LIGHT1, GL.GL_POSITION, LightPos, 0); // Set Light1 Position
gl.glLightfv(GL.GL_LIGHT1, GL.GL_AMBIENT, LightAmb, 0); // Set Light1 Ambience
gl.glLightfv(GL.GL_LIGHT1, GL.GL_DIFFUSE, LightDif, 0); // Set Light1 Diffuse
gl.glLightfv(GL.GL_LIGHT1, GL.GL_SPECULAR, LightSpc, 0); // Set Light1 Specular
gl.glEnable(GL.GL_LIGHT1);
*/// Enable Light1
// Enable Lighting
/*
gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT, MatAmb, 0); // Set Material Ambience
gl.glMaterialfv(GL.GL_FRONT, GL.GL_DIFFUSE, MatDif, 0); // Set Material Diffuse
gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, MatSpc, 0); // Set Material Specular
gl.glMaterialfv(GL.GL_FRONT, GL.GL_SHININESS, MatShn, 0); // Set Material Shininess
*/
gl.glClearColor(0,0,0,1);
gl.glEnable(GL.GL_LIGHT0);
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glShadeModel(GL.GL_SMOOTH);
gl.glLightModeli(GL.GL_LIGHT_MODEL_TWO_SIDE, GL.GL_TRUE);
gl.glCullFace(GL.GL_BACK); // Set Culling Face To Back Face
gl.glEnable(GL.GL_CULL_FACE); // Enable Culling
gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // Set Clear Color (Greenish Color)
quadric = glu.gluNewQuadric(); // Initialize Quadratic
glu.gluQuadricNormals(quadric, GL.GL_SMOOTH); // Enable Smooth Normal Generation
glu.gluQuadricTexture(quadric, false);
}
public void display(GLAutoDrawable drawable) {
GL gl = drawable.getGL();
// Clear Color Buffer, Depth Buffer, Stencil Buffer
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT);
gl.glLoadIdentity();
SetSpotlight(gl);
SetFloorMaterial(gl);
gl.glPushMatrix();
// Reset Modelview Matrix
gl.glTranslatef(0.0f, 0.0f, -20.0f); // Zoom Into The Screen 20 Units
gl.glEnable(GL.GL_TEXTURE_2D); // Enable Texture Mapping ( NEW )
drawRoom(gl); // Draw The Room
gl.glPopMatrix();
gl.glFlush(); // Flush The OpenGL Pipeline
}
private void drawRoom(GL gl) { // Draw The Room (Box)
gl.glBegin(GL.GL_QUADS); // Begin Drawing Quads
// Floor
gl.glNormal3f(0.0f, 1.0f, 0.0f); // Normal Pointing Up
gl.glVertex3f(-20.0f, -20.0f, -40.0f); // Back Left
gl.glVertex3f(-20.0f, -20.0f, 40.0f); // Front Left
gl.glVertex3f(20.0f, -20.0f, 40.0f); // Front Right
gl.glVertex3f(20.0f, -20.0f, -40.0f); // Back Right
// Ceiling
gl.glNormal3f(0.0f, -1.0f, 0.0f); // Normal Point Down
gl.glVertex3f(-10.0f, 10.0f, 20.0f); // Front Left
gl.glVertex3f(-10.0f, 10.0f, -20.0f); // Back Left
gl.glVertex3f(10.0f, 10.0f, -20.0f); // Back Right
gl.glVertex3f(10.0f, 10.0f, 20.0f); // Front Right
// Back Wall
gl.glNormal3f(0.0f, 0.0f, -1.0f); // Normal Pointing Towards Viewer
gl.glVertex3f(20.0f, 20.0f, 30.0f); // Top Right
gl.glVertex3f(20.0f, -20.0f, 30.0f); // Bottom Right
gl.glVertex3f(-20.0f, -20.0f, 30.0f); // Bottom Left
gl.glVertex3f(-20.0f, 20.0f, 30.0f); // Top Left
// Left Wall
gl.glNormal3f(1.0f, 0.0f, 0.0f); // Normal Pointing Right
gl.glVertex3f(-20.0f, 20.0f, 30.0f); // Top Front
gl.glVertex3f(-20.0f, -20.0f, 30.0f); // Bottom Front
gl.glVertex3f(-20.0f, -20.0f, -30.0f); // Bottom Back
gl.glVertex3f(-20.0f, 20.0f, -30.0f); // Top Back
// Right Wall
gl.glNormal3f(-1.0f, 0.0f, 0.0f); // Normal Pointing Left
gl.glVertex3f(20.0f, 20.0f, -30.0f); // Top Back
gl.glVertex3f(20.0f, -20.0f, -30.0f); // Bottom Back
gl.glVertex3f(20.0f, -20.0f, 30.0f); // Bottom Front
gl.glVertex3f(20.0f, 20.0f, 30.0f); // Top Front
gl.glPushMatrix();
// Front Wall
gl.glNormal3f(0.0f, 0.0f, 1.0f); // Normal Pointing Away From Viewer
gl.glTexCoord2f(1,1);
gl.glVertex3f(-20.0f, 20.0f, -30.0f); // Top Left
gl.glTexCoord2f(1,0);
gl.glVertex3f(-20.0f, -20.0f, -30.0f); // Bottom Left
gl.glTexCoord2f(0,0);
gl.glVertex3f(20.0f, -20.0f, -30.0f); // Bottom Right
gl.glTexCoord2f(0,1);
gl.glVertex3f(20.0f, 20.0f, -30.0f); // Top Right
gl.glPopMatrix();
gl.glEnd(); // Done Drawing Quads
}
public void reshape(GLAutoDrawable drawable,int xstart,int ystart,int width,int height) {
GL gl = drawable.getGL();
height = (height == 0) ? 1 : height;
gl.glViewport(0, 0, width, height);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
gl.glRotatef(90, 0.0f, 0.0f, 1.0f);
glu.gluPerspective(60, (float) width / height, 1, 1000);
glu.gluLookAt(1.0f,0.0f,25.0f,
0.0f,0.0f,0.0f,
0.0f,0.0f,1.0f);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,boolean deviceChanged) { }
private void loadGLTextures(GLAutoDrawable gldrawable) throws IOException {
TextureReader.Texture texture = null;
texture = TextureReader.readTexture("data/images/04.bmp");
GL gl = gldrawable.getGL();
//Create Nearest Filtered Texture
gl.glGenTextures(1, textures, 0);
gl.glBindTexture(GL.GL_TEXTURE_2D, textures[0]);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR);
gl.glTexImage2D(GL.GL_TEXTURE_2D,
0,
3,
texture.getWidth(),
texture.getHeight(),
0,
GL.GL_RGB,
GL.GL_UNSIGNED_BYTE,
texture.getPixels());
}
public void SetSpotlight(GL gl){
gl.glDisable(GL.GL_LIGHTING);
// prepare spotlight
float spot_ambient[] = {50.2f,0.0f,0.0f,1.0f };//white ={10.2f,10.2f,10.2f,1.0f };
float spot_diffuse[] = {50.8f,0.0f,0.0f,1.0f };
float spot_specular[] = {50.8f,0.0f,0.0f,1.0f };
// set colors here and do the geometry in draw
gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, spot_ambient,0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, spot_diffuse,0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPECULAR, spot_specular,0);
gl.glEnable(GL.GL_LIGHTING);
gl.glEnable(GL.GL_LIGHT0);
// set light position
// since ligth follows the model when mousing
// spotlight as it moves with the scene
float spot_position[] = {0.0f,60.0f,-30.0f,1.0f};
float spot_direction[] = {0.0f,0.0f,-1.0f};
float spot_angle = 10.0f;
gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, spot_position,0);
gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPOT_DIRECTION,spot_direction,0);
gl.glLightf(GL.GL_LIGHT0, GL.GL_SPOT_CUTOFF,(float)spot_angle);
// "smoothing" the border of the lightcone
// change this for effect
gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT_AND_DIFFUSE, new float[] {0.7f,0.7f,1}, 0 );
gl.glLighti(GL.GL_LIGHT0, GL.GL_SPOT_EXPONENT, 20);
gl.glEnable(GL.GL_LIGHTING);
}
public void SetFloorMaterial(GL gl){
float amb[]={0.3f,0.3f,0.0f,1.0f};
float diff[]={1.0f,1.0f,0.5f,1.0f};
float spec[]={0.6f,0.6f,0.5f,1.0f};
float shine=0.25f;
gl.glMaterialfv(GL.GL_FRONT,GL.GL_AMBIENT,amb,0);
gl.glMaterialfv(GL.GL_FRONT,GL.GL_DIFFUSE,diff,0);
gl.glMaterialfv(GL.GL_FRONT,GL.GL_SPECULAR,spec,0);
gl.glMaterialf(GL.GL_FRONT,GL.GL_SHININESS,shine*128.0f);
}
}
最佳答案
OpenGL的固定功能管线仅在顶点处进行照明，然后进行插值。由于您的房间的墙壁只有非常大的四边形，因此每个墙壁只有4个顶点，因此仅进行4次光照计算。为了获得聚光灯效果，您需要进行更多的照明计算。因此，您必须优化（即镶嵌）墙的网格，或使用每像素照明（即在片段级别上进行照明计算-这是使用着色器完成的）。
关于java - 聚光灯不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/4672850/