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more checks to prevent thrusting through mesh

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This commit is contained in:
Andrew Meadows 2019-08-27 13:51:54 -07:00
parent 43cd543226
commit 1314430f04
1 changed files with 11 additions and 10 deletions
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21
libraries/physics/src/CharacterController.cpp
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@ -784,19 +784,20 @@ void CharacterController::computeNewVelocity(btScalar dt, btVector3& velocity) {
// but we want to avoid getting stuck and tunelling through geometry so we perform
// further checks and modify/abandon our velocity calculations
if (_isStuck || _stuckTransitionCount == 0) {
// we are either definitely stuck, or definitely not --> nothing to do
const float SAFE_COLLISION_SPEED = glm::abs(STUCK_PENETRATION) * (float)NUM_SUBSTEPS_PER_SECOND;
const float SAFE_COLLISION_SPEED_SQUARED = SAFE_COLLISION_SPEED * SAFE_COLLISION_SPEED;
const float STRONG_IMPACT_THRESHOLD = -1000.0f; // this tuned manually
const float VERY_STRONG_IMPACT_THRESHOLD = -2000.0f; // this tuned manually
float velocityDotImpulse = velocity.dot(_netCollisionImpulse);
if ((velocityDotImpulse < VERY_STRONG_IMPACT_THRESHOLD && _stuckTransitionCount == 0) || _isStuck) {
// we are either definitely NOT stuck, or definitely are --> nothing to do here
return;
}
const float SAFE_COLLISION_SPEED = glm::abs(STUCK_PENETRATION) * (float)NUM_SUBSTEPS_PER_SECOND;
const float SAFE_COLLISION_SPEED_SQUARED = SAFE_COLLISION_SPEED * SAFE_COLLISION_SPEED;
bool fast = velocity.length2() > SAFE_COLLISION_SPEED_SQUARED;
const float STRONG_IMPACT_IMPULSE_DOT = -1000.0f; // this tuned manually
bool strongImpact = velocity.dot(_netCollisionImpulse) < STRONG_IMPACT_IMPULSE_DOT;
if (fast && strongImpact) {
if (velocityDotImpulse < VERY_STRONG_IMPACT_THRESHOLD ||
(velocity.length2() > SAFE_COLLISION_SPEED_SQUARED && velocityDotImpulse < STRONG_IMPACT_THRESHOLD)) {
const float REFLECTION_COEFFICIENT = 1.5f;
if (velocity.dot(currentVelocity) > 0.0f) {
// our new velocity points in the same direction as our currentVelocity