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Implement raycast camera - world collisions

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This commit is contained in:
Daniel Evans 2015-04-04 18:34:12 +01:00
parent a54e4a384e
commit 12f717c67e
1 changed files with 41 additions and 1 deletions
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42
rwgame/ingamestate.cpp
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@ -15,6 +15,26 @@
#define AUTOLOOK_TIME 2.f
/**
* This should be kept in rwengine/physics
*/
class ClosestNotMeRayResultCallback : public btCollisionWorld::ClosestRayResultCallback
{
btCollisionObject* _self;
public:
ClosestNotMeRayResultCallback( btCollisionObject* self, const btVector3& from, const btVector3& to )
: ClosestRayResultCallback( from, to ), _self( self ) {}
virtual btScalar addSingleResult(btCollisionWorld::LocalRayResult &rayResult, bool normalInWorldSpace)
{
if( rayResult.m_collisionObject == _self ) {
return 1.0;
}
return ClosestRayResultCallback::addSingleResult( rayResult, normalInWorldSpace );
}
};
IngameState::IngameState(RWGame* game, bool test)
: State(game), started(false), test(test), autolookTimer(0.f)
{
@ -143,6 +163,7 @@ void IngameState::tick(float dt)
auto position = target->getPosition();
float viewDistance = 4.f;
btCollisionObject* physTarget = player->getCharacter()->physObject;
auto vehicle = ( target->type() == GameObject::Character ) ? static_cast<CharacterObject*>(target)->getCurrentVehicle() : nullptr;
if( vehicle ) {
@ -154,6 +175,7 @@ void IngameState::tick(float dt)
}
position = vehicle->getPosition();
position.z += (vehicle->info->handling.dimensions.z / 2.f) * 2.5f;
physTarget = vehicle->physBody;
float speed = vehicle->physVehicle->getCurrentSpeedKmHour();
if( autolookTimer <= 0.f && std::abs(speed) > 1.f )
@ -193,8 +215,26 @@ void IngameState::tick(float dt)
}
}
auto rayEnd = position + angle * glm::vec3(-viewDistance, 0.f, 1.f);
auto rayStart = position + glm::vec3(0.f, 0.f, 1.f);
auto to = btVector3(rayEnd.x, rayEnd.y, rayEnd.z);
auto from = btVector3(rayStart.x, rayStart.y, rayStart.z);
ClosestNotMeRayResultCallback ray(physTarget, from, to);
getWorld()->dynamicsWorld->rayTest(from, to, ray);
if( ray.hasHit() && ray.m_closestHitFraction < 1.f )
{
position = glm::vec3(ray.m_hitPointWorld.x(), ray.m_hitPointWorld.y(),
ray.m_hitPointWorld.z());
position += glm::vec3(ray.m_hitNormalWorld.x(), ray.m_hitNormalWorld.y(),
ray.m_hitNormalWorld.z()) * 0.1f;
}
else
{
position = rayEnd;
}
// Move back from the character
position += angle * glm::vec3(-viewDistance, 0.f, 1.f);
// Tilt the final look angle down a tad.
angle *= glm::angleAxis(glm::radians(10.f), glm::vec3(0.f, 1.f, 0.f));