void Scythe::calculateMaxRotation()
{
IW_CALLSTACK("Scythe::calculateMaxRotation");
// calculate max rotation to the left
float deltaY = this->i2Position.y; //this->uAttatchedToList[0]->i2Position.y - this->i2Position.y;
float deltaX = (float)abs(this->uAttatchedToList[0]->i2Position.x - this->i2Position.x);
float rads = atan(deltaX/deltaY);
this->fMaxLeft = rads;
// caculate max rotation to the right
/*deltaY = this->i2Position.y; //abs(this->uAttatchedToList[1]->i2Position.y - this->i2Position.y);
deltaX = (float)abs(this->uAttatchedToList[1]->i2Position.x - this->i2Position.x);
rads = atan(deltaX/deltaY);
this->fMaxRight = rads;*/
// swinging scythe
this->rotAxis.x = this->i2RegionSize.x/2 + this->i2Position.x; //(this->uAttatchedToList[0]->i2Position.x + this->uAttatchedToList[1]->i2Position.x)/2;
this->rotAxis.y = this->uAttatchedToList[0]->i2Position.y /*+ this->uAttatchedToList[1]->i2Position.y)/2*/ + Screen::getBOXSIZE().y;
this->fAngle = this->fMaxLeft; //(this->fMaxLeft + this->fMaxRight)* 0.5f;
this->iLength = (int)((this->i2Position.y - this->rotAxis.y) * 0.5f); // plus 2 to avoid divide by zero.
if ( this->iLength == 0)
{
IwAssertMsg(MYAPP, false, ("scythe With length of zero, move more than one box lower than rotation point"));
}
this->fGDividedByLength = GRAVC/(float)this->iLength;
//this->fperoid = 6.28 * sqrt((float)this->iLength/GRAV);
this->mRot.SetRot(IW_ANGLE_FROM_RADIANS(this->fAngle), this->rotAxis);
}
void renderImageWorldSpace(CIwFVec2& position, float angle, float scaleFactor,
int textureSize, float worldRot, int frameNumber, int numFrames, float z) {
static CIwSVec3 vertices[4];
static CIwSVec2 UVs[4];
//set up model space vertices
int vertexDist = scaleFactor*textureSize/2;
vertices[0] = CIwSVec3(-1*vertexDist, -1*vertexDist, z);
vertices[2] = CIwSVec3(vertexDist, -1*vertexDist, z);
vertices[3] = CIwSVec3(vertexDist, vertexDist, z);
vertices[1] = CIwSVec3(-1*vertexDist, vertexDist, z);
CIwMat modelTransform = CIwMat::g_Identity;
modelTransform.SetRotZ(IW_ANGLE_FROM_RADIANS(angle));
modelTransform.SetTrans(CIwVec3(position.x, -position.y, 0));
CIwMat rot = CIwMat::g_Identity;
rot.SetRotZ(IW_ANGLE_FROM_RADIANS(worldRot));
modelTransform = modelTransform*rot;
IwGxSetModelMatrix(&modelTransform, false);
float frameRatio = 1.0/numFrames;
//set up sprite UV's
iwfixed cf = IW_FIXED((float)frameNumber / numFrames);
iwfixed nf = IW_FIXED((frameNumber + 1.0) / numFrames);
UVs[0] = CIwSVec2(cf, 0);
UVs[2] = CIwSVec2(nf, 0);
UVs[3] = CIwSVec2(nf, IW_GEOM_ONE);
UVs[1] = CIwSVec2(cf, IW_GEOM_ONE);
//render the unit in model space
IwGxSetUVStream(UVs);
IwGxSetZDepthFixed(8);
IwGxSetVertStreamModelSpace(vertices, 4);
IwGxDrawPrims(IW_GX_QUAD_STRIP, NULL, 4);
IwGxFlush();
}
void Scythe::update(uint64 time)
{
IW_CALLSTACK("Scythe::update");
if (GameState::getState() != GameState::PLAY)
{
return;
}
this->iTime = time;
this->iTimePassed += time;
// time from milliseconds to seconds
double t = (double)this->iTime * 0.001;
if ( t > 1 ) // to avoid lag spikes
{
t = 0;
}
// calulate the change in angle
this->fAngularAcceleration = -this->fGDividedByLength * sin(this->fAngle);
this->fAngularVel += this->fAngularAcceleration * t;
this->fAngle += this->fAngularVel * t;
// in case of emergency reset the scythe
if ( this->fAngularAcceleration > 10 || this->fAngularVel > 10|| this->fAngle > 10)
{
this->fAngle = this->fMaxLeft;
this->fAngularAcceleration = 0;
this->fAngularVel;
}
//update rotation matrix and boundingbox
this->mRot.SetRot(IW_ANGLE_FROM_RADIANS(this->fAngle), this->rotAxis);
this->brBoundingBox.setPosition(getRotatedCoords(CIwSVec2(this->i2Position.x + (int)(this->i2Size.x * 0.5f), this->i2Position.y + (int)(this->i2Size.y * 0.75f))));
if (this->bUpdate == true)
LethalUnit::update();
}
