/// \param angles The orientation (unit) vector that you want to reflect
/// \return Euler angles that are reflected about the slope of the plane.
EulerAngles Plane::reflectOrientation(const EulerAngles& angles) const
{
EulerAngles out;
Vector3 look, up, right;
RotationMatrix rotMat;
// get look and up vector from euler angles
rotMat.setup(angles);
look = rotMat.objectToInertial(Vector3(0.0f,0.0f,1.0f));
up = rotMat.objectToInertial(Vector3(0.0f,1.0f,0.0f));
// reflect the look and up vectors over the plane
look = reflectOrientation(look);
up = -reflectOrientation(up);
// calculate right vector
right = Vector3::crossProduct( up, look);
right.normalize();
// create a rotation matrix from right, up, and look
rotMat.m11 = right.x; rotMat.m12 = right.y; rotMat.m13 = right.z;
rotMat.m21 = up.x; rotMat.m22 = up.y; rotMat.m23 = up.z;
rotMat.m31 = look.x; rotMat.m32 = look.y; rotMat.m33 = look.z;
// calculate new euler angles from the matrix
out.fromRotationMatrix(rotMat);
return out;
}
// Resets camera to behind target object
void TetherCamera::reset()
{
Vector3 target;
float targetHeading;
assert(m_objects); // object manager doesn't exist
GameObject* obj = m_objects->getObjectPointer(m_targetObjectID);
assert(obj); // object to follow doesn't exist
targetHeading = obj->getOrientation().heading;
target = obj->getPosition();
target.y += 3.0f;
cameraOrient.set(targetHeading, 0.0f,0.0f);
RotationMatrix cameraMatrix;
cameraMatrix.setup(cameraOrient);
Vector3 bOffset(0.0f,0.0f, -maxDist);
Vector3 iOffset = cameraMatrix.objectToInertial(bOffset);
cameraPos = target + iOffset;
}
void BulletObject::updateRay()
{
EulerAngles lookEuler = getOrientation();
lookEuler.bank = 0.0f;
RotationMatrix look;
look.setup(lookEuler);
m_bulletRay = look.objectToInertial(Vector3(0.0f,0.0f,m_range));
}
bool Ned3DObjectManager::interactPlaneTerrain(PlaneObject &plane, TerrainObject &terrain)
{
Terrain *terr = terrain.getTerrain();
if(terr == NULL) return false;
//test for plane collision with terrain
Vector3 planePos = plane.getPosition();
EulerAngles planeOrient = plane.getOrientation();
Vector3 disp = planePos - disp;
RotationMatrix planeMatrix;
planeMatrix.setup(plane.getOrientation()); // get plane's orientation
float planeBottom = plane.getBoundingBox().min.y;
float terrainHeight = terr->getHeight(planePos.x,planePos.z);
if(plane.isPlaneAlive() && planeBottom < terrainHeight)
{ //collision
Vector3 viewVector = planeMatrix.objectToInertial(Vector3(0,0,1));
if(viewVector * terr->getNormal(planePos.x,planePos.z) < -0.5f // dot product
|| plane.isCrashing())
{
plane.killPlane();
int partHndl = gParticle.createSystem("planeexplosion");
gParticle.setSystemPos(partHndl, plane.getPosition());
int boomHndl = gSoundManager.requestSoundHandle("Boom.wav");
int boomInst = gSoundManager.requestInstance(boomHndl);
if(boomInst != SoundManager::NOINSTANCE)
{
gSoundManager.setPosition(boomHndl,boomInst,plane.getPosition());
gSoundManager.play(boomHndl,boomInst);
gSoundManager.releaseInstance(boomHndl,boomInst);
}
plane.setSpeed(0.0f);
planePos += 2.0f * viewVector;
planeOrient.pitch = kPi / 4.0f;
planeOrient.bank = kPi / 4.0f;
plane.setOrientation(planeOrient);
}
else planePos.y = terrainHeight + planePos.y - planeBottom;
//plane.setPPosition(planePos);
return true;
}
return false;
}
void PlaneObject::damage(int hp)
{
// if god mode is on leave
if (!takeDamage)
return;
m_hp -= hp;
setTextureAndSmoke(); // change to a texture with more damange on it
if(m_isPlaneAlive && m_hp <= 0)
{
m_planeState = PS_CRASHING;
m_velocity = Vector3::kForwardVector;
m_eaOrient[0].pitch = degToRad(20);
RotationMatrix r; r.setup(m_eaOrient[0]);
m_velocity = r.objectToInertial(m_velocity);
m_velocity *= m_maxSpeed * m_speedRatio * 20.0f;
}
}
bool Ned3DObjectManager::interactPlaneWater(PlaneObject &plane, WaterObject &water)
{
Water *pWater = water.getWater();
if(pWater == NULL) return false;
// Test for plane collision with water
Vector3 planePos = plane.getPosition();
EulerAngles planeOrient = plane.getOrientation();
Vector3 disp = planePos - disp;
RotationMatrix planeMatrix;
planeMatrix.setup(plane.getOrientation()); // get plane's orientation
float planeBottom = plane.getBoundingBox().min.y;
float waterHeight = pWater->getWaterHeight();
if(plane.isPlaneAlive() && planeBottom < waterHeight)
{ //collision
Vector3 viewVector = planeMatrix.objectToInertial(Vector3(0,0,1));
plane.killPlane();
plane.setSpeed(0.0f);
planePos += 2.0f * viewVector;
planeOrient.pitch = kPi / 4.0f;
planeOrient.bank = kPi / 4.0f;
plane.setOrientation(planeOrient);
plane.setPPosition(planePos);
int partHndl = gParticle.createSystem("planeexplosion");
gParticle.setSystemPos(partHndl, plane.getPosition());
int boomHndl = gSoundManager.requestSoundHandle("Boom.wav");
int boomInst = gSoundManager.requestInstance(boomHndl);
if(boomInst != SoundManager::NOINSTANCE)
{
gSoundManager.setPosition(boomHndl,boomInst,plane.getPosition());
gSoundManager.play(boomHndl,boomInst);
gSoundManager.releaseInstance(boomHndl,boomInst);
}
return true;
}
return false;
}
/// Rendering the particles involves looping through every live particle
/// and writing it's relevant data to a vertex buffer, and then rendering
/// that vertex buffer.
void ParticleEffect::render()
{
if(m_nLiveParticleCount == 0) // make sure we have something to render
return;
if(m_sort)
sort();
// save render states before starting
DWORD lighting;
DWORD alphablend;
DWORD zwrite;
DWORD zenable;
DWORD srcblend;
DWORD destblend;
pD3DDevice->GetRenderState(D3DRS_LIGHTING, &lighting);
pD3DDevice->GetRenderState(D3DRS_ALPHABLENDENABLE, &alphablend);
pD3DDevice->GetRenderState(D3DRS_ZWRITEENABLE, &zwrite);
pD3DDevice->GetRenderState(D3DRS_ZENABLE, &zenable);
pD3DDevice->GetRenderState(D3DRS_SRCBLEND, &srcblend);
pD3DDevice->GetRenderState(D3DRS_DESTBLEND, &destblend);
// set up particle engine states
pD3DDevice->SetRenderState(D3DRS_LIGHTING, FALSE);
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
if(m_sort)
pD3DDevice->SetRenderState(D3DRS_ZWRITEENABLE, FALSE);
else
pD3DDevice->SetRenderState(D3DRS_ZWRITEENABLE, FALSE);
pD3DDevice->SetRenderState(D3DRS_ZENABLE, TRUE);
pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
//pD3DDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
//pD3DDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_ZERO);
// set texture operations for alpha blending by setting the color
// to texture color times diffuse color, and alpha taken entirely from
// texture value
pD3DDevice->SetTextureStageState(0,D3DTSS_COLOROP,D3DTOP_MODULATE);
pD3DDevice->SetTextureStageState(0,D3DTSS_COLORARG1,D3DTA_TEXTURE);
pD3DDevice->SetTextureStageState(0,D3DTSS_COLORARG2,D3DTA_DIFFUSE);
pD3DDevice->SetTextureStageState(0,D3DTSS_ALPHAOP,D3DTOP_MODULATE);
pD3DDevice->SetTextureStageState(0,D3DTSS_ALPHAARG1,D3DTA_TEXTURE);
pD3DDevice->SetTextureStageState(0,D3DTSS_ALPHAARG2,D3DTA_DIFFUSE);
// get camera right and up vectors to figure out how to orient the sprites
D3DXMATRIXA16 view;
pD3DDevice->GetTransform(D3DTS_VIEW, &view);
Vector3 vecRight = Vector3(view._11, view._21, view._31);
Vector3 vecUp = Vector3(view._12, view._22, view._32);
Vector3 vecForward = Vector3(view._13, view._23, view._33);
// precalculate corners
Vector3 ul, ur, bl, br;
//ul = -vecRight + vecUp; // upper left
//ur = vecRight + vecUp; // upper right
//bl = -vecRight - vecUp; // bottom left
//br = vecRight - vecUp; // bottom right
pD3DDevice->SetTexture(0, m_txtParticleTexture);
if(!m_vertBuffer->lock())
{
return;
}
// shorthand to the current vertex
RenderVertexL *vert = &((*m_vertBuffer)[0]);
// although these values are the same for all particles (except color.alpha),
// you could implement some randomness, at which point there would be a
// reason to assign to them with every iteration of the loop
unsigned int color;
float size = m_fPISize/2.0f; // half of m_fPISize in each direction
float tTop = 0;
float tBottom = 1.0f;
float tLeft = 0;
float tRight = 1.0f;
// loop through all live particles to assign proper values to the vertices
for (int i=0; i<m_nLiveParticleCount; i++)
{
Vector3 pos = m_Particles[m_drawOrder[i]].position;
color = m_Particles[m_drawOrder[i]].color;
Vector3 myUp, myRight;
Quaternion q;
q.setToRotateAboutAxis(vecForward, m_Particles[m_drawOrder[i]].rotation);
RotationMatrix r;
r.fromObjectToInertialQuaternion(q);
myUp = r.objectToInertial(vecUp);
myRight = r.objectToInertial(vecRight);
ul = -myRight + myUp; // upper left
ur = myRight + myUp; // upper right
bl = -myRight - myUp; // bottom left
br = myRight - myUp; // bottom right
vert->p = pos + ul*size;
vert->argb = color;
vert->u = tLeft;
vert->v = tTop;
vert++;
vert->p = pos + ur*size;
vert->argb = color;
vert->u = tRight;
vert->v = tTop;
vert++;
vert->p = pos + bl*size;
vert->argb = color;
vert->u = tLeft;
vert->v = tBottom;
vert++;
vert->p = pos + br*size;
vert->argb = color;
vert->u = tRight;
vert->v = tBottom;
vert++;
}
m_vertBuffer->unlock();
gRenderer.render(
m_vertBuffer,
m_nLiveParticleCount * 4,
m_indexBuffer,
m_nLiveParticleCount * 2);
// restore render states
pD3DDevice->SetRenderState(D3DRS_LIGHTING, lighting);
pD3DDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, alphablend);
pD3DDevice->SetRenderState(D3DRS_ZWRITEENABLE, zwrite);
pD3DDevice->SetRenderState(D3DRS_ZENABLE, zenable);
pD3DDevice->SetRenderState(D3DRS_SRCBLEND, srcblend);
pD3DDevice->SetRenderState(D3DRS_DESTBLEND, destblend);
}
