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T3D Jetpack Function

by Kiyaku · in Torque Game Engine Advanced · 08/20/2008 (12:23 am) · 4 replies

Hi,
in the T3D demo (the one with the boombot and polysoup models) you can use a jetpack when you hold the right mouse button.

I wanted to create something simliar and used applyImpulse for it.

But i wanted to check how it is done in the T3D demo, though i can't really find the code for it.

I looked up the default.bind.cs. The right mouse button opens the function "alttrigger" which just increase the var "$mvTriggerCount1" by 1. That's it. i searched for the same variable in every script file but couldn't find it.

Is it coded in C++ or do i miss something?

Thanks in advance!
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Torque 3D Owner Ashley Leach
#1
08/20/2008 (1:46 am)
Its an array in C++
mTriggerCount[i]

search in the engine for mvTriggerCount
so access that one as mTriggerCount[1]

-Ash

Torque Owner Kiyaku
#2
08/20/2008 (2:18 am)
Thanks, i could find the code where the variables gets created:

for(U32 i = 0; i < MaxTriggerKeys; i++)
{
char varName[256];
dSprintf(varName, sizeof(varName), "mvTriggerCount%d", i);
Con::addVariable(varName, TypeS32, &mTriggerCount[i]);
}


so now i just have to find out what exactly this trigger no. 1 will execute in the code to trigger the "jetpack" function.

Thanks so far!

Torque Owner Taylor Petrick
#3
08/20/2008 (2:45 am)
The jetting code itself is in player.cpp. I'm not entirely sure if it links into the trigger code there too, though.

Torque Owner Kiyaku
#4
08/20/2008 (2:46 am)
Thanks, i found it. The trigger variable isn't the same as mTriggerCount.

if (move->trigger[1] && !isMounted() && canJetJump()) 
   { 
      mJetting = true; 
 
      // Scale the jump impulse base on maxJumpSpeed 
      F32 zSpeedScale = mVelocity.z; 
 
      if (zSpeedScale <= mDataBlock->jetMaxJumpSpeed) 
      { 
         zSpeedScale = (zSpeedScale <= mDataBlock->jetMinJumpSpeed)? 1: 
         1 - (zSpeedScale - mDataBlock->jetMinJumpSpeed) / (mDataBlock->jetMaxJumpSpeed - mDataBlock->jetMinJumpSpeed); 
 
         // Desired jump direction 
         VectorF pv = moveVec; 
         F32 len = pv.len(); 
 
         if (len > 0.0f) 
            pv *= 1 / len; 
 
         // If we are facing into the surface jump up, otherwise 
         // jump away from surface. 
         F32 dot = mDot(pv,mJumpSurfaceNormal); 
         F32 impulse = mDataBlock->jetJumpForce / mMass; 
 
         if (dot <= 0) 
            acc.z += mJumpSurfaceNormal.z * impulse * zSpeedScale; 
         else 
         { 
            acc.x += pv.x * impulse * dot; 
            acc.y += pv.y * impulse * dot; 
            acc.z += mJumpSurfaceNormal.z * impulse * zSpeedScale; 
         } 
 
         mEnergy -= mDataBlock->jetJumpEnergyDrain; 
      } 
   }