public static void LineToPolygon(CCPoint[] points, float stroke, ccVertex2F[] vertices, int offset, int nuPoints)
{
int num;
CCPoint cCPoint;
nuPoints = nuPoints + offset;
if (nuPoints <= 1)
{
return;
}
stroke = stroke * 0.5f;
int num1 = nuPoints - 1;
for (int i = offset; i < nuPoints; i++)
{
num = i * 2;
CCPoint cCPoint1 = points[i];
if (i == 0)
{
cCPoint = CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(cCPoint1, points[i + 1])));
}
else if (i != num1)
{
CCPoint cCPoint2 = points[i + 1];
CCPoint cCPoint3 = points[i - 1];
CCPoint cCPoint4 = CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(cCPoint2, cCPoint1));
CCPoint cCPoint5 = CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(cCPoint3, cCPoint1));
float single = (float)Math.Acos((double)CCPointExtension.ccpDot(cCPoint4, cCPoint5));
if (single >= ccMacros.CC_DEGREES_TO_RADIANS(70f))
{
cCPoint = (single >= ccMacros.CC_DEGREES_TO_RADIANS(170f) ? CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(cCPoint2, cCPoint3))) : CCPointExtension.ccpNormalize(CCPointExtension.ccpMidpoint(cCPoint4, cCPoint5)));
}
else
{
cCPoint = CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpMidpoint(cCPoint4, cCPoint5)));
}
}
else
{
cCPoint = CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(points[i - 1], cCPoint1)));
}
cCPoint = CCPointExtension.ccpMult(cCPoint, stroke);
vertices[num] = new ccVertex2F(cCPoint1.x + cCPoint.x, cCPoint1.y + cCPoint.y);
vertices[num + 1] = new ccVertex2F(cCPoint1.x - cCPoint.x, cCPoint1.y - cCPoint.y);
}
offset = (offset == 0 ? 0 : offset - 1);
for (int j = offset; j < num1; j++)
{
num = j * 2;
int num2 = num + 2;
ccVertex2F _ccVertex2F = vertices[num];
ccVertex2F _ccVertex2F1 = vertices[num + 1];
ccVertex2F _ccVertex2F2 = vertices[num2];
ccVertex2F _ccVertex2F3 = vertices[num2 + 1];
float single1 = 0f;
bool flag = !CCVertex.LineIntersect(_ccVertex2F.x, _ccVertex2F.y, _ccVertex2F3.x, _ccVertex2F3.y, _ccVertex2F1.x, _ccVertex2F1.y, _ccVertex2F2.x, _ccVertex2F2.y, out single1);
if (!flag && (single1 < 0f || single1 > 1f))
{
flag = true;
}
if (flag)
{
vertices[num2] = _ccVertex2F3;
vertices[num2 + 1] = _ccVertex2F2;
}
}
}
public static void LineToPolygon(CCPoint[] points, float stroke, ccVertex2F[] vertices, int offset, int nuPoints)
{
nuPoints += offset;
if (nuPoints <= 1)
{
return;
}
stroke *= 0.5f;
int idx;
int nuPointsMinus = nuPoints - 1;
for (int i = offset; i < nuPoints; i++)
{
idx = i * 2;
CCPoint p1 = points[i];
CCPoint perpVector;
if (i == 0)
{
perpVector = CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(p1, points[i + 1])));
}
else if (i == nuPointsMinus)
{
perpVector = CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(points[i - 1], p1)));
}
else
{
CCPoint p2 = points[i + 1];
CCPoint p0 = points[i - 1];
CCPoint p2p1 = CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(p2, p1));
CCPoint p0p1 = CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(p0, p1));
// Calculate angle between vectors
float angle = (float)Math.Acos(CCPointExtension.ccpDot(p2p1, p0p1));
if (angle < ccMacros.CC_DEGREES_TO_RADIANS(70))
{
perpVector = CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpMidpoint(p2p1, p0p1)));
}
else if (angle < ccMacros.CC_DEGREES_TO_RADIANS(170))
{
perpVector = CCPointExtension.ccpNormalize(CCPointExtension.ccpMidpoint(p2p1, p0p1));
}
else
{
perpVector = CCPointExtension.ccpPerp(CCPointExtension.ccpNormalize(CCPointExtension.ccpSub(p2, p0)));
}
}
perpVector = CCPointExtension.ccpMult(perpVector, stroke);
vertices[idx] = new ccVertex2F(p1.x + perpVector.x, p1.y + perpVector.y);
vertices[idx + 1] = new ccVertex2F(p1.x - perpVector.x, p1.y - perpVector.y);
}
// Validate vertexes
offset = (offset == 0) ? 0 : (offset - 1);
for (int i = offset; i < nuPointsMinus; i++)
{
idx = i * 2;
int idx1 = idx + 2;
ccVertex2F p1 = vertices[idx];
ccVertex2F p2 = vertices[idx + 1];
ccVertex2F p3 = vertices[idx1];
ccVertex2F p4 = vertices[idx1 + 1];
float s = 0f;
//BOOL fixVertex = !ccpLineIntersect(ccp(p1.x, p1.y), ccp(p4.x, p4.y), ccp(p2.x, p2.y), ccp(p3.x, p3.y), &s, &t);
bool fixVertex = !LineIntersect(p1.x, p1.y, p4.x, p4.y, p2.x, p2.y, p3.x, p3.y, out s);
if (!fixVertex)
{
if (s < 0.0f || s > 1.0f)
{
fixVertex = true;
}
}
if (fixVertex)
{
vertices[idx1] = p4;
vertices[idx1 + 1] = p3;
}
}
}
