public void SetGlow(int id, Vector2 position, Color color, float radius, bool shadows, float timeout)
{
_lightMutex.WaitOne();
for (int x = 0; x < _glows.Count; x++)
{
if (_glows[x].id == id)
{
_glows[x].position = position;
_glows[x].radius = radius;
_glows[x].timeOut = timeout;
_glows[x].color = color;
if (radius < 0)
_glows.RemoveAt(x);
_lightMutex.ReleaseMutex();
return;
}
}
LightSource glow = new LightSource();
glow.id = id;
glow.position = position;
glow.radius = radius;
glow.timeOut = timeout;
glow.timeOutStart = timeout;
glow.color = color;
glow.shadows = shadows;
_glows.Add(glow);
_lightMutex.ReleaseMutex();
}
public void DrawLight(Camera cam, LightSource light, Map map, SpriteBatch batch)
{
//Clear stencil buffer
device.Clear(ClearOptions.Stencil, Color.White, 0, 1);
if (light.shadows)
{
Vector2 camPosition = cam.Position;
//cam.MoveTo(light.position, 1);
UnShadowTiles(cam, batch, map);
//cam.MoveTo(camPosition,1);
//Build shadow geometry for the light
int vertexCount = map.CreateShadowGeometry(light.position, new Rectangle((int)(light.position.X - light.radius), (int)(light.position.Y - light.radius), (int)(2*light.radius), (int)(2*light.radius)), shadowVB);
//Draw Shadows into stencil buffer
device.BlendState = generateShadow;
device.DepthStencilState = generateShadowStencil;
shadowEffect.CurrentTechnique = shadowEffect.Techniques["Shadow"];
device.SetVertexBuffer(shadowVB);
device.Indices = shadowIB;
shadowEffect.CurrentTechnique.Passes[0].Apply();
//Check necessary because empty draw calls cause crashes
if (vertexCount > 0)
device.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, vertexCount, 0, 4 * vertexCount / 6);
}
//Draw glow over everything that has not been stenciled out
shadowEffect.CurrentTechnique = shadowEffect.Techniques["Glow"];
batch.Begin(SpriteSortMode.Immediate, addLight, null, drawShadowedLight, RasterizerState.CullNone, shadowEffect);
//I need to specify a texture to use this call, but since I use a custom shader it is never used, it might actually be null I am not sure
batch.Draw(_unusedTexture, new Rectangle((int)(light.position.X - light.radius), (int)(light.position.Y - light.radius), (int)(light.radius * 2), (int)(light.radius * 2)), Color.Lerp(light.color, Color.Black, 1-light.brightness));
batch.End();
}