[TOC]
想实现一个摩托车的物理载具，所以先在Snippet里面改了一下
PxVehicleNoDrive
看到UE4中是用PxVehicleNoDrive实现的，就想在SnippetVehicleNoDrive快速改一下看下效果，结果改了几行代码就基本看到效果了
1.修改轮子个数
VehicleDesc initVehicleDesc()
{
// 省略...
// two wheels
const PxU32 nbWheels = 2;
2.修改报错
主要是默认是四个轮子的，然后默认代码传多了，删掉即可
void startBrakeMode()
{
gVehicleNoDrive->setBrakeTorque(0, 1000.0f);
gVehicleNoDrive->setBrakeTorque(1, 1000.0f);
//gVehicleNoDrive->setBrakeTorque(2, 1000.0f);
//gVehicleNoDrive->setBrakeTorque(3, 1000.0f);
}
void startHandbrakeTurnLeftMode()
{
//gVehicleNoDrive->setBrakeTorque(2, 1000.0f);
//gVehicleNoDrive->setBrakeTorque(3, 1000.0f);
gVehicleNoDrive->setDriveTorque(0, 1000.0f);
gVehicleNoDrive->setDriveTorque(1, 1000.0f);
gVehicleNoDrive->setSteerAngle(0, 1.0f);
gVehicleNoDrive->setSteerAngle(1, 1.0f);
}
void startHandbrakeTurnRightMode()
{
//gVehicleNoDrive->setBrakeTorque(2, 1000.0f);
//gVehicleNoDrive->setBrakeTorque(3, 1000.0f);
gVehicleNoDrive->setDriveTorque(0, 1000.0f);
gVehicleNoDrive->setDriveTorque(1, 1000.0f);
gVehicleNoDrive->setSteerAngle(0, -1.0f);
gVehicleNoDrive->setSteerAngle(1, -1.0f);
}
void releaseAllControls()
{
gVehicleNoDrive->setDriveTorque(0, 0.0f);
gVehicleNoDrive->setDriveTorque(1, 0.0f);
//gVehicleNoDrive->setDriveTorque(2, 0.0f);
//gVehicleNoDrive->setDriveTorque(3, 0.0f);
gVehicleNoDrive->setBrakeTorque(0, 0.0f);
gVehicleNoDrive->setBrakeTorque(1, 0.0f);
//gVehicleNoDrive->setBrakeTorque(2, 0.0f);
//gVehicleNoDrive->setBrakeTorque(3, 0.0f);
gVehicleNoDrive->setSteerAngle(0, 0.0f);
gVehicleNoDrive->setSteerAngle(1, 0.0f);
//gVehicleNoDrive->setSteerAngle(2, 0.0f);
//gVehicleNoDrive->setSteerAngle(3, 0.0f);
}
3.控制台提示参数不对
..\..\PhysXVehicle\src\PxVehicleUpdate.cpp (244) : invalid parameter : PxVehicleComputeSprungMasses: sprungMassCoordinates must all be valid coordinates
断点看一下就知道问题在哪里了，主要是计算便宜的时候坐标是无穷大，修改下下面的代码即可
void computeWheelCenterActorOffsets
(const PxF32 wheelFrontZ, const PxF32 wheelRearZ, const PxVec3& chassisDims, const PxF32 wheelWidth, const PxF32 wheelRadius, const PxU32 numWheels, PxVec3* wheelCentreOffsets)
{
// 两个轮子的时候deltaZ算的时候除以0了
//const PxF32 deltaZ = (wheelFrontZ - wheelRearZ) / (numLeftWheels - 1.0f);
PX_UNUSED(numWheels);
PX_UNUSED(wheelWidth);
//front wheel offset from origin.
wheelCentreOffsets[0] = PxVec3(0.f, -(chassisDims.y / 2 + wheelRadius), wheelRearZ);
//rear wheel offsets from origin.
wheelCentreOffsets[1] = PxVec3(0.f, -(chassisDims.y / 2 + wheelRadius), wheelFrontZ);
}
PVD效果
因为渲染窗口没有重播功能，不好找角度，就在PVD里面录制了
