尝试了几个小时来设置一个简单的交叉头发作为纹理(所以我以后可以像正常的十字线一样粘在视图的中间),没有运气。
我用JOGL编写Java代码。
P.S还需要使纹理的背景透明。但这是另一个问题。
public void display(GLAutoDrawable gLDrawable) {
final GL2 gl = gLDrawable.getGL().getGL2();
gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
gl.glLoadIdentity(); // Reset The View
gl.glTranslatef(0.0f, 0.0f, -5.0f);
gl.glTexParameteri ( GL2.GL_TEXTURE_2D,GL2.GL_TEXTURE_WRAP_T, GL2.GL_REPEAT );
gl.glTexParameteri( GL2.GL_TEXTURE_2D,GL2.GL_TEXTURE_WRAP_S, GL2.GL_REPEAT );
texture.bind(gl);
gl.glBegin(GL2.GL_QUADS);
// Front Face
gl.glTexCoord2f(0.0f, 0.0f);
gl.glVertex3f(-1.0f, -1.0f, 1.0f);
gl.glTexCoord2f(2f, 0.0f);
gl.glVertex3f(1.0f, -1.0f, 1.0f);
gl.glTexCoord2f(2f, 1.0f);
gl.glVertex3f(1.0f, 1.0f, 1.0f);
gl.glTexCoord2f(0.0f, 1.0f);
gl.glVertex3f(-1.0f, 1.0f, 1.0f);
gl.glEnd();
}
public void init(GLAutoDrawable drawable) {
final GL2 gl = drawable.getGL().getGL2();
gl.glShadeModel(GL2.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.glEnable(GL2.GL_DEPTH_TEST); // Enables Depth Testing
gl.glDepthFunc(GL2.GL_LEQUAL); // The Type Of Depth Testing To Do
// Really Nice Perspective Calculations
gl.glHint(GL2.GL_PERSPECTIVE_CORRECTION_HINT, GL2.GL_NICEST);
gl.glEnable(GL2.GL_TEXTURE_2D);
try {
String filename = "resources/misc/crosshair.png";
texture=TextureIO.newTexture(new File( filename ),true);
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MIN_FILTER, GL2.GL_LINEAR);
gl.glTexParameteri(GL2.GL_TEXTURE_2D, GL2.GL_TEXTURE_MAG_FILTER, GL2.GL_LINEAR);
}
答案 0 :(得分:0)
也许还有更多问题,但至少看起来不对:
gl.glTexCoord2f(2f, 1.0f);
您的纹理水平重复2次,因为其包裹模式为重复,您设置的坐标超过1
(在本例中为2f
)。要解决此问题,请将2f
替换为1f
:
gl.glTexCoord2f(1f, 1.0f);