Question

我的翻译和轮换存在问题。当我想像这样旋转它的工作 http://i.stack.imgur.com/UyeOn.png

 textureProgram.useProgram();

for ( i =0; i < 5; i ++)
{
     Matrix.setLookAtM(modelMatrix, 0, 0, 0, 1.0f, 0.0f, 0f, 0f, 0f, 1.0f, 0.0f);
     Matrix.multiplyMM(modelViewProjectionMatrix, 0, projectionMatrix, 0, modelMatrix, 0);
     Matrix.setRotateM(RotationMatrix, 0, 12f, 0, 0,  1.0f);
     Matrix.multiplyMM( projectionMatrix, 0, modelViewProjectionMatrix, 0,    RotationMatrix,     0);   
    textureProgram.setUniforms(projectionMatrix, mur1texture);
     this.bindData(textureProgram);
     glDrawArrays(GL_TRIANGLE_FAN, 0, 6);
     }

但我不能在我的OrthoM投影中旋转超过我的远数，我根本不明白。例如，如果我的号码是3，就像这样：

     Matrix.orthoM(projectionMatrix, 0, 0, 1280, 800, 0, -1, 3);

即使我必须旋转5次，我也能旋转3次而不是更多次。例如，我必须增加数量才能旋转5次。有人可以帮助我，我真的不明白这个问题。

编辑：这样，它只旋转一次，旋转时物体会变形。

http://i.stack.imgur.com/jEfID.png

      for ( i =0; i < 5; i ++)
    {
    Matrix.setLookAtM(modelMatrix, 0, 0, 0, 1.0f, 0.0f, 0f, 0f, 0f, 1.0f, 0.0f);
    Matrix.setRotateM(RotationMatrix, 0, 12f, 0, 0,  1.0f);
    Matrix.multiplyMM(modelMatrix, 0, modelMatrix, 0, RotationMatrix, 0);
    Matrix.multiplyMM(modelViewProjectionMatrix, 0, projectionMatrix, 0, modelMatrix, 0);

     textureProgram.setUniforms(modelViewProjectionMatrix, mur1texture);
     this.bindData(textureProgram);
     glDrawArrays(GL_TRIANGLE_FAN, 0, 6);

}

编辑2：这样它可以正常旋转但只旋转一次：S。

  for ( i =0; i < 5; i ++)
   {
     Matrix.setLookAtM(modelMatrix, 0, 0, 0, 1.0f, 0.0f, 0f, 0f, 0f, 1.0f, 0.0f);
     Matrix.multiplyMM(modelViewProjectionMatrix, 0, projectionMatrix, 0, modelMatrix, 0);
     Matrix.setRotateM(RotationMatrix, 0, 45f, 0, 0,  1.0f);
     Matrix.multiplyMM(modelViewProjectionMatrix, 0,  projectionMatrix, 0,       RotationMatrix, 0);


     textureProgram.setUniforms(modelViewProjectionMatrix, mur1texture);
     this.bindData(textureProgram);
     glDrawArrays(GL_TRIANGLE_FAN, 0, 6);


}

编辑3：仍然只旋转一次。

int u , i ;
textureProgram.useProgram();

Matrix.setLookAtM(modelmatrix, 0, 0, 0, 1.0f, 0.0f, 0f, 0f, 0f, 1.0f, 0.0f);
Matrix.multiplyMM(modelViewProjectionMatrix, 0, projectionMatrix, 0, modelmatrix, 0);

 for ( i =0; i < 5; i ++)
 {

      Matrix.setRotateM(RotationMatrix, 0, 12f, 0, 0,  1.0f);
      Matrix.multiplyMM( modelViewProjectionMatrix, 0, projectionMatrix, 0,RotationMatrix,     0);   
     textureProgram.setUniforms(modelViewProjectionMatrix, mur1texture);
     this.bindData(textureProgram);
     glDrawArrays(GL_TRIANGLE_FAN, 0, 6);
    }

打开GL ES 2，矩阵OrthoM和翻译

0 个答案: