在JOGL中渲染紋理球體

Question

我一直在尋找幾個小時來找到一個在JOGL中繪製紋理球體的好方法。我需要的只是朝正確的方向發展，或者某些代碼適用於某人。到目前爲止，我所能找到的是helloTexture（雖然它有效，但顯然不是球體），是否有辦法將其轉換爲球體，或者我應該在其他地方嘗試運氣？

Answer 1

我寫這個給你，這是未經測試，因爲我修改了它與GL_TRIANGLES工作，試圖讓我知道

radius是球體半徑，rings是水平切片，sectors垂直那些

private void createGeometry(float radius, short rings, short sectors) { 

    float R = 1f/(float)(rings - 1); 
    float S = 1f/(float)(sectors - 1); 
    short r, s; 
    float x, y, z; 

    points = new float[rings * sectors * 3]; 
    normals = new float[rings * sectors * 3]; 
    texcoords = new float[rings * sectors * 2]; 

    int t = 0, v = 0, n = 0; 
    for(r = 0; r < rings; r++) { 
     for(s = 0; s < sectors; s++) { 
      x = (float) (Math.cos(2 * Math.PI * s * S) * Math.sin(Math.PI * r * R)); 
      y = (float) Math.sin(-Math.PI/2 + Math.PI * r * R); 
      z = (float) (Math.sin(2 * Math.PI * s * S) * Math.sin(Math.PI * r * R)); 

      texcoords[t++] = s * S; 
      texcoords[t++] = r * R; 

      points[v++] = x * radius; 
      points[v++] = y * radius; 
      points[v++] = z * radius; 

      normals[n++] = x; 
      normals[n++] = y; 
      normals[n++] = z; 
     } 


    } 
    int counter = 0; 
    indices = new short[rings * sectors * 6]; 
    for(r = 0; r < rings - 1; r++){ 
     for(s = 0; s < sectors-1; s++) { 
      indices[counter++] = (short) (r * sectors + s);  
      indices[counter++] = (short) (r * sectors + (s + 1)); 
      indices[counter++] = (short) ((r + 1) * sectors + (s + 1)); 
      indices[counter++] = (short) ((r + 1) * sectors + (s + 1)); 
      indices[counter++] = (short) (r * sectors + (s + 1));  
      indices[counter++] = (short) ((r + 1) * sectors + s);  
     } 
    } 
}