ilikecats/stk-code_catmod
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Added to-be-reviewed code to make driving vertically impossible (I'm not sure of the way I determine how vertical we are so I'd welcome testing and revieing)

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git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@6495 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
auria 2010-11-10 23:53:14 +00:00
parent 07f6ffb194
commit 905219f0b2
2 changed files with 38 additions and 1 deletions
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2
data/stk_config.xml
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@ -242,7 +242,7 @@
<!-- friction: slip used for bullet skidding. A high value
(like 10000000) disables bullet skidding. -->
<friction slip="10"/>
<friction slip="1000"/>
<!-- Values related to stability of the chassis: damping, and reduced
impact of roll. -->

37
src/karts/kart.cpp
View File

@ -22,6 +22,7 @@
#include <math.h>
#include <iostream>
#include <algorithm> // for min and max
#include "audio/music_manager.hpp"
#include "audio/sfx_manager.hpp"
@ -1350,6 +1351,42 @@ void Kart::updatePhysics(float dt)
{
m_skid_sound->stop();
}
// dynamically determine friction so that the kart looses its traction when trying to drive on too steep surfaces
// Below angles of 0.25 rad, you have full traction; above 0.5 rad angles you have absolutely none; inbetween
// there is a linear change in friction
float friction = 1.0f;
if (isOnGround())
{
float pitch = fabs(getPitch());
float roll = fabsf(getRoll());
if (pitch > 0.25f)
{
friction = std::min( friction, std::max(1.0f - (pitch - 0.25f) / 0.25f, 0.0f) );
}
if (roll > 0.25f)
{
friction = std::min( friction, std::max(1.0f - (roll - 0.25f) / 0.25f, 0.0f) );
}
}
for (unsigned int i=0; i<4; i++)
{
btWheelInfo& wheel = m_vehicle->getWheelInfo(i);
wheel.m_frictionSlip = friction*m_kart_properties->getFrictionSlip();
}
/*
// debug prints
static float f = 0.0f;
f += dt;
if (f > 0.5f)
{
f -= 0.5f;
printf("[%s] %f %f --> friction = %f\n", m_kart_properties->getIdent().c_str(), getPitch(), getRoll(), friction);
}
*/
float steering = getMaxSteerAngle() * m_controls.m_steer*m_skidding;
m_vehicle->setSteeringValue(steering, 0);