在OpenGL中创建直角三角棱镜

我还发现(至少在JOGL中,不知道其他地方)glutSolidCylinder不能正常工作-端板的旋转角度不同于侧面,给你一个非常奇怪的外形。

 private void unitTriangularPrism(GL gl, boolean solid){
    // back endcap
    gl.glBegin(solid ? GL.GL_TRIANGLES : GL.GL_LINES);
    gl.glVertex3f(1f, 0f, 0f);
    gl.glVertex3f(0f, 0f, 0f);
    gl.glVertex3f(0f, 1f, 0f);
    gl.glEnd();

    // front endcap
    gl.glBegin(solid ? GL.GL_TRIANGLES : GL.GL_LINES);
    gl.glVertex3f(1f, 0f, 1f);
    gl.glVertex3f(0f, 0f, 1f);
    gl.glVertex3f(0f, 1f, 1f);
    gl.glEnd();

    // bottom
    gl.glBegin(solid ? GL.GL_QUADS : GL.GL_LINES);
    gl.glVertex3f(0f, 0f, 0f);
    gl.glVertex3f(1f, 0f, 0f);
    gl.glVertex3f(1f, 0f, 1f);
    gl.glVertex3f(0f, 0f, 1f);
    gl.glEnd();

    // back
    gl.glBegin(solid ? GL.GL_QUADS : GL.GL_LINES);
    gl.glVertex3f(0f, 0f, 0f);
    gl.glVertex3f(0f, 1f, 0f);
    gl.glVertex3f(0f, 1f, 1f);
    gl.glVertex3f(0f, 0f, 1f);
    gl.glEnd();

    // top
    gl.glBegin(solid ? GL.GL_QUADS : GL.GL_LINES);
    gl.glVertex3f(0f, 1f, 0f);
    gl.glVertex3f(1f, 0f, 0f);
    gl.glVertex3f(1f, 0f, 1f);
    gl.glVertex3f(0f, 1f, 1f);
    gl.glEnd();
}