bool ShadowTessellator::isClockwisePath(const SkPath& path) {
SkPath::Iter iter(path, false);
SkPoint pts[4];
SkPath::Verb v;
Vector<Vector2> arrayForDirection;
while (SkPath::kDone_Verb != (v = iter.next(pts))) {
switch (v) {
case SkPath::kMove_Verb:
arrayForDirection.add((Vector2){pts[0].x(), pts[0].y()});
break;
case SkPath::kLine_Verb:
arrayForDirection.add((Vector2){pts[1].x(), pts[1].y()});
break;
case SkPath::kQuad_Verb:
arrayForDirection.add((Vector2){pts[1].x(), pts[1].y()});
arrayForDirection.add((Vector2){pts[2].x(), pts[2].y()});
break;
case SkPath::kCubic_Verb:
arrayForDirection.add((Vector2){pts[1].x(), pts[1].y()});
arrayForDirection.add((Vector2){pts[2].x(), pts[2].y()});
arrayForDirection.add((Vector2){pts[3].x(), pts[3].y()});
break;
default:
break;
}
}
return isClockwise(arrayForDirection.array(), arrayForDirection.size());
}
void Sprite::draw()
{
ccDrawColor4F(1, 1, 1, 1);
if(_isTouch)
{
if(isClockwise())
{
_directAngle -= 7;
}
else
{
_directAngle += 7;
}
}
float cx,cy,tx,ty,cl;
cx = _radius*cos(CC_DEGREES_TO_RADIANS(_directAngle));
cy = _radius*sin(CC_DEGREES_TO_RADIANS(_directAngle));
cl = sqrtf(cx*cx+cy*cy);
tx = cy/cl;
ty = -cx/cl;
CCPoint points[] = { CCPoint(cx+_baseLength/2*tx,cy+_baseLength/2*ty), CCPoint(cx-ty*_height,cy+tx*_height), CCPoint(cx-_baseLength/2*tx,cy-_baseLength/2*ty) };
ccDrawPoly(points, sizeof(points)/sizeof(points[0]), true);
}
void m_Polygon::updateNormals() {
for(int i=0; i < numVerticies; i++) {
vector2f diff = getVertex(i) - getVertex(i + 1);
float temp = diff.x;
diff.x = diff.y;
diff.y = -temp;
if(!isClockwise()) diff *= -1;
normals[i] = diff.normalized();
}
}
void
Polygon::odbOutputLayerFeature(
OdbFeatureFile& file, QPointF location, Xform *xform, PolygonType type)
{
// island == POLYGON (must clockwise), hole == CUTOUT (must counter clockwise)
bool clockwise = isClockwise();
if ((type == POLYGON && clockwise) ||
(type == CUTOUT && !clockwise)) {
odbOutputFeature(file, location, xform, type, FORWARD);
}
else {
odbOutputFeature(file, location, xform, type, REVERSE);
}
}
