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Wheeledvehicle adding lights to "light" node ...

by Vivek Kambli · in Torque Game Engine · 04/30/2005 (12:32 am) · 16 replies

I have added a "point" light to car with some modification to wheeledvehicle.c /h
My car model do not look nice with "point" light source. I am modifying the code to add spot light for headlight and break lights ...

For this code to work, create a car model with four node ( for lights at headlight and break light position.) Name the nodes as below

light0
light1
light2
light3

And then modify the code ...

---------------------------------------------------------------------------------------------------
Wheeledvehicle.h
---------------------------------------------------------------------------------------------------
find code 
#ifndef _VEHICLE_H_
#include "game/vehicles/vehicle.h"
#endif

after the code add 
//lights
#ifndef _LIGHTMANAGER_H_
#include "sceneGraph/lightManager.h"
#endif

in struct WheeledVehicleData: public VehicleData {

find 
S32 brakeLightSequence;       // Brakes
   S32 steeringSequence;         // Steering animation
after the code add 
//lights
   bool hasLight;
   F32 lightRadius;
   ColorF lightColor;
   VectorF     mDirection; 
   //light node 
   S32 lightNode[4];

in class WheeledVehicle: public Vehicle find 
Wheel mWheel[WheeledVehicleData::MaxWheels];
   TSThread* mSteeringThread;

after the code add
//lights
   void registerLights(LightManager * lm, bool lightingScene);
   LightInfo mLight;
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Torque Owner Vivek Kambli
#1
04/30/2005 (12:32 am)
---------------------------------------------------------------------------------------------------
wheeledvehicle.cc
---------------------------------------------------------------------------------------------------
in WheeledVehicleData::WheeledVehicleData() find 
brakeLightSequence = -1;

after the code add
//lights
   hasLight = true;
   lightRadius = 3;
   lightColor.set(1, 1, 1);
   mDirection.set(0.f,1.f,0.f);

in bool WheeledVehicleData::preload(bool server, char errorBuffer[256]) find 
TSShapeInstance* si = new TSShapeInstance(shape, false);

after the code add
//lights
   lightColor.clamp();
   //	resolve light nodes
   lightNode[0]=-1;
   lightNode[1]=-1;
   lightNode[2]=-1;
   lightNode[3]=-1;

   lightNode[0]=shape->findNode("light0");
   lightNode[1]=shape->findNode("light1");
   lightNode[2]=shape->findNode("light2");
   lightNode[3]=shape->findNode("light3");

in void WheeledVehicleData::initPersistFields() add at the end
//lights
   addNamedField(hasLight, TypeBool, WheeledVehicleData);
   addNamedFieldV(lightRadius, TypeF32, WheeledVehicleData, new FRangeValidator(1, 20));
   addNamedField(lightColor, TypeColorF, WheeledVehicleData);

in void WheeledVehicleData::packData(BitStream* stream) add at the end
//lights
   if(stream->writeFlag(hasLight))
   {
      stream->writeFloat(lightRadius/20.0, 8);
      stream->writeFloat(lightColor.red,7);
      stream->writeFloat(lightColor.green,7);
      stream->writeFloat(lightColor.blue,7);
   }

in void WheeledVehicleData::unpackData(BitStream* stream) add at the end
//lights
   hasLight = stream->readFlag();
   if(hasLight)
   {
      lightRadius = stream->readFloat(8) * 20;
      lightColor.red = stream->readFloat(7);
      lightColor.green = stream->readFloat(7);
      lightColor.blue = stream->readFloat(7);
   }

in bool WheeledVehicle::onAdd() add before addToScene();
//lights      
   if (mDataBlock->hasLight == true)
         Sim::getLightSet()->addObject(this);

add at the end of file ....
//lights

void WheeledVehicle::registerLights(LightManager * lightManager, bool lightingScene)
{
   if(lightingScene)
     return;

   if (mDataBlock->hasLight ) 
   {
      mLight.mType = LightInfo::Spot;
      mLight.mDirection = mDataBlock->mDirection;
  	  
	  //Point3F osp,sp;
	  Point3F osp,sp;
      if (mDataBlock->lightNode[0] != -1)
        {
		  mShapeInstance->mNodeTransforms[mDataBlock->lightNode[0]].getColumn(3,&osp);
		  getRenderTransform().mulP(osp,&sp);
		  mLight.mPos = sp;
		}
	  else
        getRenderTransform().getColumn(3, &mLight.mPos);

      mLight.mRadius = mDataBlock->lightRadius;
      mLight.mColor  = mDataBlock->lightColor;
      lightManager->addLight(&mLight);
   }
}

rebuild engine ...
you are done .....

Torque Owner Richard O
#2
05/03/2005 (3:41 am)
Do those lights cast shadows? nice resource by the way

Torque Owner Vivek Kambli
#3
05/03/2005 (4:29 am)
No, working on it , just got the spot light working see the snap shot

us.f1f.yahoofs.com/bc/3e368b2e/bc/Yahoo!+Photo+Album/torque/car_headlight.jpg?bfuI2dCBjjLC9b.q
still need some more coding to get it working on diff and terrain ... i will post this as a resource once fully operational ...

Torque Owner Byungryang So
Default Studio Name
#4
07/04/2005 (9:33 pm)
The c source the bedspread script which it changes but becomes, when it changes how, it hangs Thank you.

Torque Owner arda
#5
10/10/2005 (6:31 am)
Hi Vikek, Does this work?

Torque 3D Owner Cyberkada
Triluminary Design Studios
#6
10/28/2007 (3:13 am)
To make this compile and work in TGE 1.5.2, I had to change the following:

from:
#include "sceneGraph/lightManager.h"
to:
#include "lightingSystem/sgLightManager.h"

and from:
lightManager->addLight(&mLight);
to:
lightManager->sgRegisterGlobalLight(&mLight);

additionally, in simBase.h, I removed virtual from the registerLights method to make it compile.
from:
virtual void registerLights(LightManager * lm, bool lightingScene) { }
to:
void registerLights(LightManager * lm, bool lightingScene) { }

Torque Owner Ronald J Nelson
Code Hammer Games
#7
10/28/2007 (8:40 pm)
How did this work for you?

Torque 3D Owner Cyberkada
Triluminary Design Studios
#8
10/29/2007 (6:01 am)
Well I'm still testing it. I had to do the above to make it compile and not complain. I put this in vehicle.h/.cc, and have to find datablocks to make it work. Looks like light to light4 might also have to be capitalized per the dts node listings. I will report on this once I can get ANY lights working in my game.

Torque Owner Ronald J Nelson
Code Hammer Games
#9
11/07/2007 (10:14 am)
Have you had any luck with this yet?

Torque 3D Owner Cyberkada
Triluminary Design Studios
#10
11/12/2007 (7:41 pm)
It works, but not how I expected.
img128.imageshack.us/img128/4955/screenshot00600002jo4.png

Torque Owner Ronald J Nelson
Code Hammer Games
#11
11/12/2007 (7:55 pm)
That looks like you just need to make some tweaks to the light object itself. Well I am certainly interested. Did you have to make a lot of changes to the code above?

Torque 3D Owner Cyberkada
Triluminary Design Studios
#12
11/13/2007 (1:07 am)
No, for some reason I decided to restart my code from scratch using TGE 1.5.2/ AFX 1.0.2 as a base, with my engine changes added back in. I compiled, and the bloody thing now works. One problem is that the nodes are not light nodes, but rather standard mount points. I will dig into the lighting code to change it to Light0...Light4, per the docs and the above resource. The above effect is stock, I will change as I tweak it. As soon as I fix the above, I will post it as a resource.

Torque Owner Martin Schultz
#13
11/13/2007 (1:21 am)
Wow, cool screenie. Looks good.

Torque 3D Owner Cyberkada
Triluminary Design Studios
#14
11/16/2007 (1:01 am)
Update: Added engine glow to engines using lights.

Torque Owner Ronald J Nelson
Code Hammer Games
#15
11/23/2007 (6:54 pm)
Nice work. Any luck with shadows?

Torque Owner Ronald J Nelson
Code Hammer Games
#16
11/26/2007 (8:08 pm)
I do have a question in regards to this. Are the lights on all of the time? I am asking because I want to make it turn the headlights on and off.