public void drawSegment(Vector2 start, Vector2 end, Color color)
{
start = FSConvert.toDisplayUnits(start);
end = FSConvert.toDisplayUnits(end);
_primitiveBatch.addVertex(start, color, PrimitiveType.LineList);
_primitiveBatch.addVertex(end, color, PrimitiveType.LineList);
}
public void drawSolidCircle(Vector2 center, float radius, Vector2 axis, Color color)
{
const double increment = Math.PI * 2.0 / circleSegments;
double theta = 0.0;
Color colorFill = color * 0.5f;
Vector2 v0 = center + radius * new Vector2((float)Math.Cos(theta), (float)Math.Sin(theta));
FSConvert.toDisplayUnits(ref v0, out v0);
theta += increment;
for (int i = 1; i < circleSegments - 1; i++)
{
Vector2 v1 = center + radius * new Vector2((float)Math.Cos(theta), (float)Math.Sin(theta));
Vector2 v2 = center + radius * new Vector2((float)Math.Cos(theta + increment), (float)Math.Sin(theta + increment));
_primitiveBatch.addVertex(v0, colorFill, PrimitiveType.TriangleList);
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(v1), colorFill, PrimitiveType.TriangleList);
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(v2), colorFill, PrimitiveType.TriangleList);
theta += increment;
}
drawCircle(center, radius, color);
drawSegment(center, center + axis * radius, color);
}
public void drawPolygon(Vector2[] vertices, int count, Color color, bool closed = true)
{
for (int i = 0; i < count - 1; i++)
{
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(vertices[i]), color, PrimitiveType.LineList);
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(vertices[i + 1]), color, PrimitiveType.LineList);
}
if (closed)
{
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(vertices[count - 1]), color, PrimitiveType.LineList);
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(vertices[0]), color, PrimitiveType.LineList);
}
}
public void drawCircle(Vector2 center, float radius, Color color)
{
const double increment = Math.PI * 2.0 / circleSegments;
double theta = 0.0;
for (int i = 0; i < circleSegments; i++)
{
Vector2 v1 = center + radius * new Vector2((float)Math.Cos(theta), (float)Math.Sin(theta));
Vector2 v2 = center + radius * new Vector2((float)Math.Cos(theta + increment), (float)Math.Sin(theta + increment));
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(v1), color, PrimitiveType.LineList);
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(v2), color, PrimitiveType.LineList);
theta += increment;
}
}
public void drawSolidPolygon(Vector2[] vertices, int count, Color color, bool outline = true)
{
if (count == 2)
{
drawPolygon(vertices, count, color);
return;
}
var colorFill = color * (outline ? 0.5f : 1.0f);
for (int i = 1; i < count - 1; i++)
{
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(vertices[0]), colorFill, PrimitiveType.TriangleList);
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(vertices[i]), colorFill, PrimitiveType.TriangleList);
_primitiveBatch.addVertex(FSConvert.toDisplayUnits(vertices[i + 1]), colorFill, PrimitiveType.TriangleList);
}
if (outline)
{
drawPolygon(vertices, count, color);
}
}