Java 如何在立方体中设置摄影机?
我有一个立方体,每个边锁有不同的颜色-Java 如何在立方体中设置摄影机?,java,opengl,jogl,glulookat,Java,Opengl,Jogl,Glulookat,我有一个立方体,每个边锁有不同的颜色- public void display(GLAutoDrawable drawable) { final GL gl = drawable.getGL(); gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT); ///// SET CAMERA ///// setCamera(gl, glu, 100);
public void display(GLAutoDrawable drawable) {
final GL gl = drawable.getGL();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
///// SET CAMERA /////
setCamera(gl, glu, 100);
// /////// Cube - start ///////////
// cube
// ----- Render the Color Cube -----
gl.glLoadIdentity(); // reset the current model-view matrix
gl.glTranslatef(0f, 0.0f, -7.0f); // translate right and into the
// screen
gl.glRotatef(angleCube, 1.0f, 1.0f, 1.0f); // rotate about the x, y and
// z-axes
gl.glBegin(GL.GL_QUADS); // of the color cube
// Top-face
gl.glColor3f(0.0f, 1.0f, 0.0f); // green
gl.glVertex3f(1.0f, 1.0f, -1.0f);
gl.glVertex3f(-1.0f, 1.0f, -1.0f);
gl.glVertex3f(-1.0f, 1.0f, 1.0f);
gl.glVertex3f(1.0f, 1.0f, 1.0f);
// Bottom-face
gl.glColor3f(1.0f, 0.5f, 0.0f); // orange
gl.glVertex3f(1.0f, -1.0f, 1.0f);
gl.glVertex3f(-1.0f, -1.0f, 1.0f);
gl.glVertex3f(-1.0f, -1.0f, -1.0f);
gl.glVertex3f(1.0f, -1.0f, -1.0f);
// Front-face
gl.glColor3f(1.0f, 0.0f, 0.0f); // red
gl.glVertex3f(1.0f, 1.0f, 1.0f);
gl.glVertex3f(-1.0f, 1.0f, 1.0f);
gl.glVertex3f(-1.0f, -1.0f, 1.0f);
gl.glVertex3f(1.0f, -1.0f, 1.0f);
// Back-face
gl.glColor3f(1.0f, 1.0f, 0.0f); // yellow
gl.glVertex3f(1.0f, -1.0f, -1.0f);
gl.glVertex3f(-1.0f, -1.0f, -1.0f);
gl.glVertex3f(-1.0f, 1.0f, -1.0f);
gl.glVertex3f(1.0f, 1.0f, -1.0f);
// Left-face
gl.glColor3f(0.0f, 0.0f, 1.0f); // blue
gl.glVertex3f(-1.0f, 1.0f, 1.0f);
gl.glVertex3f(-1.0f, 1.0f, -1.0f);
gl.glVertex3f(-1.0f, -1.0f, -1.0f);
gl.glVertex3f(-1.0f, -1.0f, 1.0f);
// Right-face
gl.glColor3f(1.0f, 0.0f, 1.0f); // violet
gl.glVertex3f(1.0f, 1.0f, -1.0f);
gl.glVertex3f(1.0f, 1.0f, 1.0f);
gl.glVertex3f(1.0f, -1.0f, 1.0f);
gl.glVertex3f(1.0f, -1.0f, -1.0f);
gl.glEnd(); // of the color cube
// /////// Cube - end //////////
}
private void setCamera(GL gl, GLU glu, float distance) {
// Change to projection matrix.
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
// Perspective.
float widthHeightRatio = (float) getWidth() / (float) getHeight();
glu.gluPerspective(1, widthHeightRatio, 1, 1000);
glu.gluLookAt(0,0, 150, 0, 0, 0, 0, 1, 0);
// Change back to model view matrix.
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
}
在这种状态下,我得到的数据是
指位于立方体前面的摄像机
由于我试图在立方体内设置相机,我将glu.gluLookAt
中的z轴值更改为-glu.gluLookAt(0,0,50,0,0,0,0,0,1,0)我知道我得到的是-
如果我改为-glu.gluLookAt(0,0,0,0,0,0,0,1,0)代码>我得到全屏幕黑色
所以,为了在立方体中设置相机,我必须改变的是——这意味着被排除的图形在右、左、上、下都是不同的颜色 glu.gluLookAt(0,0,0,0,0,0,0,1,0)
似乎无效。尝试将其设置为
glu.gluLookAt(0,0,0,0,0,-1,0,1,0)
编辑:
删除glTranslatef
glu.gluLookAt(0,0,0,0,0,0,0,1,0)
似乎无效。尝试将其设置为
glu.gluLookAt(0,0,0,0,0,-1,0,1,0)
编辑:
删除glTranslatef
它在所有屏幕上都是黄色的,就像我附加的第二张图片。是的,它都是黄色的,因为你现在在立方体中,你能看到的是位于z=-1的面。它在所有屏幕上都是黄色的,就像我附加的第二张图片。是的,它都是黄色的,因为你现在在立方体中,你能看到的是位于z=-1-1的面,垂直空格过多。-1,垂直空格过多。
glu.gluPerspective(100, widthHeightRatio, 0.5, 1000);
glu.gluLookAt(0, 0, 0.0, 0.0, 0, -1.0, 0, 1, 0);