Question

我的正投影，等距摄像机视图存在问题，即使对象放置在视图中，我也会剪切远离场景中心0,0,0的对象。

在 onSurfaceChanged 方法中，我有：

GLES20.glViewport(0, 0, width, height); 
final float ratio = (float) width / height;

final float left = -ratio;
final float right = ratio;
final float bottom = -1.0f;
final float top = 1.0f;
final float near = 1.0f;
final float far = 10.0f;

int useForOrtho = Math.min(width, height);
mProjectionMatrix = createOrthoProjectionMatrix(left, right, top, bottom, near, far);
Matrix.orthoM(mViewMatrix, 0,
            -useForOrtho / 2,
            useForOrtho / 2,
            -useForOrtho / 2,
            useForOrtho / 2, 0.01f, 100.0f);

Matrix.rotateM(mViewMatrix, 0, 45, 0.0f, 0.0f, 1.0f);
Matrix.rotateM(mViewMatrix, 0, 35, 1.0f, -1.0f, 0.0f);

以下是投影矩阵的功能：

public float[] createOrthoProjectionMatrix(float left, float right, float top, float bottom, float near, float far)
{

    float[] m = new float[16];

    m[0] = 2.0f / (right - left);
    m[1] = 0.0f;
    m[2] = 0.0f;
    m[3] = 0.0f;

    m[4] = 0.0f;
    m[5] = 2.0f / (top - bottom);
    m[6] = 0.0f;
    m[7] = 0.0f;

    m[8] = 0.0f;
    m[9] = 0.0f;
    m[10] = -2.0f / (far - near);
    m[11] = 0.0f;

    m[12] = -(right + left  ) / (right - left  );
    m[13] = -(top   + bottom) / (top   - bottom);
    m[14] = -(far   + near  ) / (far   - near  );
    m[15] = 1.0f;

    return m;
}

在哪里可以控制x，y，z远离0,0,0的距离，可以在不剪裁的情况下绘制对象？问题对象不会被放置在视线之内，但更像是当前的渲染体积 - 超出距离 - 有三角形被剪裁。

Java：OpenGL ES 2.0，视图剪辑

0 个答案: