在球体之间绘制保持相同尺寸的圆柱体以产生对撞机 [英] Draw cylinders between spheres keeping the same dimension to have a collider

问题描述

我有点卡住了.我试图在两个球体之间绘制一个圆柱体，同时在Game View中保持其在Z轴上的大小始终相同.目的是通过关闭圆柱体的网格渲染器"(Mesh Renderer)使其不可见，从而使围绕小控件线的碰撞器成为可能.用LineRenderer替换Gizmos线也很好，但我总是需要它的大小与两侧的球体相同.

I'm a little stuck. I'm trying to draw a cylinder between two spheres while keeping its size always the same on the Z axis in Game View. The aim is to get a collider around the gizmos line by turning off the cylinder's Mesh Renderer to make it invisible. It would also be good to replace the Gizmos line with a LineRenderer but I would always need it to be the same size as the sphere on both sides.

这是我的代码:

GameObject newSphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);
// currentPosPoint = mouse click
newSphere.transform.position = currentPosPoint; 
// this way all the spheres appear of the same size even if in a different position on the Z axis
newSphere.transform.localScale = Vector3.one * ((new Plane(cam.transform.forward, 
                                                           cam.transform.position).GetDistanceToPoint(
                                                           newSphere.transform.position)) / radiusPoint);
// if the sphere is not the first
if (count > 1) {
    Vector3 start = posSphere1;
    Vector3 end = posSphere2;
    GameObject newCyl = GameObject.CreatePrimitive(PrimitiveType.Cylinder);
    // I find the central position between the two spheres
    Vector3 pos = Vector3.Lerp(start, end, 0.5f);
    newCyl.transform.position = pos;
    // I find the rotation of the cylinder
    Vector3 dirV = Vector3.Normalize(end - start);
    Vector3 cylDefaultOrientation = new Vector3(0,1,0);
    Vector3 rotAxisV = dirV + cylDefaultOrientation;
    rotAxisV = Vector3.Normalize(rotAxisV);
    newCyl.transform.rotation = new Quaternion(rotAxisV.x, rotAxisV.y, rotAxisV.z, 0);
    float dist = Vector3.Distance(end, start);
    // it is from this point that I cannot get out of it
    // I resize the cylinder like the sphere
    newCyl.transform.localScale = Vector3.one * ((new Plane(cam.transform.forward, 
                                                            cam.transform.position).GetDistanceToPoint(
                                                            newCyl.transform.position)) / radiusPoint);
    // I assign the length of the cylinder to join its two ends to the spheres
    Vector3 newScale = newCyl.transform.localScale;
    newScale.y= dist/2;
    newCyl.transform.localScale = newScale;      
}

如您所见，只有在X轴上定向圆柱体时，圆柱体才与球体相同.

As you can see the cylinders are the same size as the sphere only if they are oriented on the X axis.

您对始终获得相同尺寸的气瓶有什么建议吗? 正如我说过的，不需要使用圆柱体，目标是在Gizmos线周围放置一个对撞机，任何更改都将是很好的.

Do you have any suggestions to always get the same size of cylinders? As I said it is not needed to use cylinders, the target is to get a collider around the gizmos line, any change would be good.

推荐答案

将对象与LineRenderer一起使用，并根据起点和终点位置设置起点/终点宽度.

Use an object with a LineRenderer, and set the start/endwidth based on the start and end positions.

GameObject go = new GameObject("LineRenderer Object")
LineRenderer lr = go.AddComponent<LineRenderer>() as LineRenderer;

Vector3 start = posSphere1;
Vector3 end = posSphere2;

Plane camPlane = new Plane(cam.transform.forward, cam.transform.position)

float startWidth = camPlane.GetDistanceToPoint(start)) / radiusPoint);
float endWidth = camPlane.GetDistanceToPoint(end)) / radiusPoint);

// Make sure line renderer width curve is linear
lr.widthCurve = AnimationCurve.Linear(0f, startWidth , 1f, endWidth);

确保将GameObject放置在数组中的某个位置，以便可以Destroy放置.

Make sure you put the GameObject somewhere like in an array so you can Destroy it.

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