Question

在C ++中，我在我的小体素游戏中实现了一个小型碰撞检测和响应系统。现在只有AABB和Voxel（体素是一个立方体，所以它也是AABB）。

实际上一切正常，只有一个特殊的例外，如果玩家（AABB）正好以45度移动到体素的边缘，则玩家会快速进出一点点故障。在图像上你可以看到它。

现在我想知道是什么导致了这个问题，但我找不到任何逻辑错误！？所以我现在在伪代码中如何做到这一点：

float xNew = xCurrent + xVelocity * deltaTime;
float yNew = yCurrent + yVelocity * deltaTime;
float zNew = zCurrent + zVelocity * deltaTime;

float xCorrected = xNew;
float yCorrected = yNew;
float zCorrected = zNew;

// If the player is moving to right side.
if (xNew < xCurrent)
{
    %DO THE FOLLOWING FOR EACH OF THE 4 CORNERS OF THE PLAYER AABB,%
    %ON THE RIGHT FACE, UNTIL ONE COLLISION OCCURS%
    {
        float x = xNew;
        float y = yCurrent + %CORNER_Y_OFFSET%;
        float z = zCurrent + %CORNER_Z_OFFSET%;

        if (getVoxelAt(x, y, z).isSolid())
        {
            xCorrected = (unsigned int)x + 1;

            // Abbort and check z axis.
            break;
        }
    }
}
else if(...)
// Check for the opposite direction...

// If the player is moving to front side.
if (zNew < zCurrent)
{
    %DO THE FOLLOWING FOR EACH OF THE 4 CORNERS OF THE PLAYER AABB,%
    %ON THE RIGHT FACE, UNTIL ONE COLLISION OCCURS%
    {
        float x = xCurrent + %CORNER_X_OFFSET%;
        float y = yCurrent + %CORNER_Y_OFFSET%;
        float z = zNew;

        if (getVoxelAt(x, y, z).isSolid())
        {
            zCorrected = (unsigned int)z + 1;

            // Abbort and check Y axis.
            break;
        }
    }
}
else if(...)
// Check for the opposite direction...

// Y axis check, not important for now....

// Apply corrected positions.
xCurrent = xCorrected;
yCurrent = yCorrected;
zCurrent = zCorrected;

编辑：

Z轴，而不是屏幕截图上的Y轴。我的错误。

Screenshot example http://fs1.directupload.net/images/150722/ottekmg7.png Diagram of example http://fs1.directupload.net/images/150722/sldarmk4.png

AABB与AABB碰撞检测和响应

0 个答案: