/*!
\param screen_position screen position
\param position_ position
\param direction_ direction
*/
void Storm3D_Scene::GetEyeVectors(const VC2I &screen_position, Vector &position_, Vector &direction_)
{
static const float NEAR_Z = 2.f;
D3DXMATRIX pProjection;
D3DXMATRIX pView;
VC3 camera_up = camera.GetUpVec();
VC3 camera_position = camera.GetPosition();
VC3 camera_target = camera.GetTarget();
D3DXMatrixLookAtLH(pView, camera_position, camera_target, camera_up);
//RECT windowSize = { 0 };
//GetClientRect(Storm3D2->window_handle, &windowSize);
igios_unimplemented();
Storm3D_SurfaceInfo ss = Storm3D2->GetScreenSize();
float aspect=(float) ss.width / (float) ss.height;
float fov = camera.GetFieldOfView();
float vis_range = camera.GetVisibilityRange();
VC3 pV;
D3DXMatrixPerspectiveFovLH(pProjection,fov,aspect,1.0f,vis_range);
pV.x = 1.0f;
pV.y = 1.0f;
pV.z = 1.0f;
//pV.x = ( ( ( 2.0f * (float)screen_position.x ) / windowSize.right ) - 1 ) / pProjection._11;
//pV.y = -( ( ( 2.0f * (float)screen_position.y ) / windowSize.bottom ) - 1 ) / pProjection._22;
//pV.z = 1.0f;
D3DXMATRIX m;
D3DXMatrixInverse(m, NULL, pView);
VC3 vPickRayDir;
VC3 vPickRayOrig;
vPickRayDir.x = pV.x*m._11 + pV.y*m._21 + pV.z*m._31;
vPickRayDir.y = pV.x*m._12 + pV.y*m._22 + pV.z*m._32;
vPickRayDir.z = pV.x*m._13 + pV.y*m._23 + pV.z*m._33;
vPickRayDir = vPickRayDir.GetNormalized();
vPickRayOrig.x = m._41;
vPickRayOrig.y = m._42;
vPickRayOrig.z = m._43;
vPickRayOrig+=vPickRayDir*NEAR_Z;
direction_.x = vPickRayDir.x;
direction_.y = vPickRayDir.y;
direction_.z = vPickRayDir.z;
position_.x = vPickRayOrig.x;
position_.y = vPickRayOrig.y;
position_.z = vPickRayOrig.z;
}
void GravityPointParticleForce::calcForce(Vector& force, const Vector& pos, const Vector& vel) {
VC3 diff = pos - m_point;
VC3 diffNorm = diff.GetNormalized();
float diffLenSq = diff.GetSquareLength();
if (fabsf(diffLenSq) < 0.01f)
{
force.x = 0.0f;
force.y = 0.0f;
force.z = 0.0f;
} else {
// realistic gravity (bad)
//force = -diffNorm * 0.001f * m_gravity / diffLenSq;
// unrealisic gravity (better)
float diffLen = sqrtf(diffLenSq);
force = -diffNorm * 0.001f * m_gravity / diffLen;
}
}
bool LineAreaChecker::isPointInsideLineArea(const VC3 &point,
const VC3 &lineStart, const VC3 &lineEnd, float lineWidth)
{
VC3 projPos = lineEnd - lineStart;
float projPosLenSq = projPos.GetSquareLength();
VC3 projPosNorm = VC3(0,0,0);
if (projPosLenSq > 0.00001f)
{
projPosNorm = projPos.GetNormalized();
}
VC3 chkpos = point - lineStart;
float chkposLen = chkpos.GetLength();
VC3 hitAndUnitDiff = chkpos - projPos;
float hitAndUnitDiffLenSq = hitAndUnitDiff.GetSquareLength();
float lineRadiusSq = (float)(lineWidth * lineWidth);
if (hitAndUnitDiffLenSq < lineRadiusSq)
{
return true;
}
if (chkposLen * chkposLen < projPosLenSq)
{
VC3 pipedPos = projPosNorm * chkposLen;
VC3 posdiff = chkpos - pipedPos;
if (posdiff.GetSquareLength() < lineRadiusSq)
{
return true;
}
}
return false;
}
// return true if position ok and decal should be added
// false, if position NOT ok and decal should NOT be added
bool DecalPositionCalculator::calculateDecalPosition(
game::GameScene *gameScene,
const VC3 &origin, const VC3 &velocity,
DECAL_POSITIONING positioning, int positionRandom,
VC3 *resultPosition, QUAT *resultRotation)
{
assert(positioning != DecalPositionCalculator::DECAL_POSITIONING_INVALID);
game::GameMap *gameMap = gameScene->getGameMap();
bool hitWall = false;
*resultPosition = origin;
*resultRotation = QUAT((-3.1415926f / 2.0f),0,0);
// if velocity positioning...
if (positioning == DecalPositionCalculator::DECAL_POSITIONING_VELOCITY)
{
VC3 velocityRandomized;
if (positionRandom > 0)
{
velocityRandomized = velocity * GAME_TICKS_PER_SECOND;
// TEMP
//char buf[64];
//sprintf(buf, "%f,%f,%f", velocity.x, velocity.y, velocity.z);
//Logger::getInstance()->error(buf);
// TODO: add positionRandom to velocity _angle_...
// (or maybe just do a quick hack and add it to xz-coordinates?)
velocityRandomized.x += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
velocityRandomized.z += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
// add to y too? maybe should add downward only?
// NOTE: biased downward
velocityRandomized.y += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
velocityRandomized.y -= float(positionRandom) / 100.0f * 0.5f;
} else {
velocityRandomized = velocity;
}
velocityRandomized *= 2.0f;
IStorm3D_Scene *scene = gameScene->getStormScene();
VC3 dir = velocityRandomized.GetNormalized();
VC3 rayOrigin = origin;
float rayLen = velocityRandomized.GetLength();
Storm3D_CollisionInfo sceneColl;
sceneColl.includeTerrainObjects = false;
scene->RayTrace(rayOrigin, dir, rayLen, sceneColl, true);
/*
if (sceneColl.hit)
{
VC3 hitNormal = sceneColl.plane_normal;
// make a "wall" hit if normal-y is not nearly 1
//if (fabs(hitNormal.y) < 0.8f)
{
hitWall = true;
VC3 x(rand() % 1000 / 999.f, 0, rand() % 1000 / 999.f);
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
assert(fabsf(x.GetDotWith(y)) < 0.0001f);
assert(fabsf(x.GetDotWith(hitNormal)) < 0.0001f);
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, hitNormal.x);
tm.Set(9, hitNormal.y);
tm.Set(10, hitNormal.z);
*resultRotation = tm.GetRotation();
}
*resultPosition = sceneColl.position;
} else {
*resultPosition += velocityRandomized;
}
*/
// New version
{
VC3 hitNormal(0, 1.f, 0);
if(sceneColl.hit)
{
hitNormal = sceneColl.plane_normal;
*resultPosition = sceneColl.position;
}
else
{
*resultPosition += velocityRandomized;
VC2 p2(resultPosition->x, resultPosition->z);
hitNormal = gameScene->getTerrain()->getFaceNormal(p2);
}
{
if(sceneColl.hit)
hitWall = true;
/*
VC3 y = dir;
VC3 z = hitNormal;
y -= hitNormal * y.GetDotWith(hitNormal);
VC3 x = z.GetCrossWith(y);
*/
VC3 x = dir;
x.y = 0.f;
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
VC3 z = hitNormal;
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, z.x);
tm.Set(9, z.y);
tm.Set(10, z.z);
resultRotation->MakeFromAngles(0.f, 0.f, -PI*0.5f);
*resultRotation = (*resultRotation) * tm.GetRotation();
/*
VC3 x(rand() % 1000 / 999.f, 0, rand() % 1000 / 999.f);
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
assert(fabsf(x.GetDotWith(y)) < 0.0001f);
assert(fabsf(x.GetDotWith(hitNormal)) < 0.0001f);
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, hitNormal.x);
tm.Set(9, hitNormal.y);
tm.Set(10, hitNormal.z);
*resultRotation = tm.GetRotation();
*/
}
}
// TODO: some kind of terrain raytrace maybe...?
// should collide to walls, etc.
}
// if downward positioning...
if (positioning == DecalPositionCalculator::DECAL_POSITIONING_DOWNWARD)
{
if (positionRandom > 0)
{
// TODO: add a random xz-offset to result position
//*resultPosition += randomizedOffset;
resultPosition->x += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
resultPosition->z += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
}
/*
// psd
{
VC2 p2(resultPosition->x, resultPosition->z);
VC3 hitNormal = gameScene->getTerrain()->getFaceNormal(p2);
VC3 x(rand() % 1000 / 999.f, 0, rand() % 1000 / 999.f);
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
assert(fabsf(x.GetDotWith(y)) < 0.0001f);
assert(fabsf(x.GetDotWith(hitNormal)) < 0.0001f);
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, hitNormal.x);
tm.Set(9, hitNormal.y);
tm.Set(10, hitNormal.z);
*resultRotation = tm.GetRotation();
}
*/
VC3 fooNormal;
calculateDecalRotation(gameScene, *resultPosition, *resultRotation, 0.f, fooNormal);
}
// now check that we're still inside map boundaries
if (!gameMap->isWellInScaledBoundaries(resultPosition->x, resultPosition->z))
{
// out of map.
return false;
}
// then fix decal height to ground height
if (positioning == DecalPositionCalculator::DECAL_POSITIONING_DOWNWARD
|| positioning == DecalPositionCalculator::DECAL_POSITIONING_VELOCITY)
{
if (!hitWall)
{
resultPosition->y = gameMap->getScaledHeightAt(resultPosition->x, resultPosition->z);
}
}
// check that not on top of metal grid area...
if (game::MaterialManager::isMaterialUnderPosition(gameMap,
*resultPosition, MATERIAL_METAL_GRATE))
{
// on top of grid, no decal here.
return false;
}
// TODO: check that not inside a wall, terrainobject, etc.
// if so, return false
return true;
}