public void Add(MyTriangle_Vertexes triangle, Vector3 normal, ref MyPlane rightPlane, ref MyPlane upPlane, float decalScale, float alpha, bool alphaBlendByAngle, ref BoundingSphere decalSphere)
{
float alpha0 = alpha;
float alpha1 = alpha;
float alpha2 = alpha;
if (alphaBlendByAngle == true)
{
alpha0 *= GetAlphaByDistance(ref triangle.Vertex0, ref decalSphere);
alpha1 *= GetAlphaByDistance(ref triangle.Vertex1, ref decalSphere);
alpha2 *= GetAlphaByDistance(ref triangle.Vertex2, ref decalSphere);
}
if ((alpha0 <= 0.0f) && (alpha1 <= 0.0f) && (alpha2 <= 0.0f))
{
// Decal would be totaly transparent so it doesn't make sense to draw it
return;
}
MyCockpitGlassDecalTriangle decalTriangle = m_triangles.Allocate();
if (decalTriangle == null)
{
return;
}
decalTriangle.Position0 = triangle.Vertex0;
decalTriangle.Position1 = triangle.Vertex1;
decalTriangle.Position2 = triangle.Vertex2;
// Texture coords
decalTriangle.TexCoord0 = new Vector2(
0.5f + decalScale * MyUtils.GetDistanceFromPointToPlane(ref decalTriangle.Position0, ref rightPlane),
0.5f + decalScale * MyUtils.GetDistanceFromPointToPlane(ref decalTriangle.Position0, ref upPlane));
decalTriangle.TexCoord1 = new Vector2(
0.5f + decalScale * MyUtils.GetDistanceFromPointToPlane(ref decalTriangle.Position1, ref rightPlane),
0.5f + decalScale * MyUtils.GetDistanceFromPointToPlane(ref decalTriangle.Position1, ref upPlane));
decalTriangle.TexCoord2 = new Vector2(
0.5f + decalScale * MyUtils.GetDistanceFromPointToPlane(ref decalTriangle.Position2, ref rightPlane),
0.5f + decalScale * MyUtils.GetDistanceFromPointToPlane(ref decalTriangle.Position2, ref upPlane));
// Normal
normal = MinerWars.CommonLIB.AppCode.Utils.MyMwcUtils.Normalize(normal);
decalTriangle.Normal0 = normal;
decalTriangle.Normal1 = normal;
decalTriangle.Normal2 = normal;
decalTriangle.Alpha012.X = alpha0;
decalTriangle.Alpha012.Y = alpha1;
decalTriangle.Alpha012.Z = alpha2;
// Time created
decalTriangle.CreatedTime = MyMinerGame.TotalGamePlayTimeInMilliseconds;
}
// Copy triangles to array of vertexes (which is then copyed to vertex buffer) and return count of triangles to draw
public int CopyDecalsToVertices(MyVertexFormatGlassDecal[] vertexes)
{
int trianglesToDraw = 0;
foreach (LinkedListNode <MyCockpitGlassDecalTriangle> item in m_triangles)
{
MyCockpitGlassDecalTriangle triangle = item.Value;
int deltaTime = MyMinerGame.TotalGamePlayTimeInMilliseconds - triangle.CreatedTime;
// If triangleVertexes is completely faded-out, we remove it from buffer and don't draw it now
if (deltaTime >= (m_fadeOutStartInMiliseconds + m_fadeOutLengthInMiliseconds))
{
m_triangles.MarkForDeallocate(item);
continue;
}
int vertexIndexStart = trianglesToDraw * MyCockpitGlassDecalsConstants.VERTEXES_PER_DECAL;
// Texture coords
vertexes[vertexIndexStart + 0].TexCoord = triangle.TexCoord0;
vertexes[vertexIndexStart + 1].TexCoord = triangle.TexCoord1;
vertexes[vertexIndexStart + 2].TexCoord = triangle.TexCoord2;
float alpha = 1.0f;
if (deltaTime <= m_fadeInPhaseInMiliseconds)
{
// If we are in fade-in phase (initial phase)
alpha = (float)deltaTime / (float)m_fadeInPhaseInMiliseconds;
}
else if (deltaTime >= m_fadeOutStartInMiliseconds)
{
// If fading-out started, change alpha here
alpha = 1.0f - ((float)(deltaTime - m_fadeOutStartInMiliseconds) / (float)m_fadeOutLengthInMiliseconds);
}
// Vertex position
vertexes[vertexIndexStart + 0].SetPositionAndAlpha(ref triangle.Position0, System.Math.Min(alpha, triangle.Alpha012.X));
vertexes[vertexIndexStart + 1].SetPositionAndAlpha(ref triangle.Position1, System.Math.Min(alpha, triangle.Alpha012.Y));
vertexes[vertexIndexStart + 2].SetPositionAndAlpha(ref triangle.Position2, System.Math.Min(alpha, triangle.Alpha012.Z));
// Normal vectors
Vector3 normal0 = triangle.Normal0;
Vector3 normal1 = triangle.Normal1;
Vector3 normal2 = triangle.Normal2;
// Normals for glass decals aren't normalized
normal0.Normalize();
normal1.Normalize();
normal2.Normalize();
vertexes[vertexIndexStart + 0].Normal = normal0;
vertexes[vertexIndexStart + 1].Normal = normal1;
vertexes[vertexIndexStart + 2].Normal = normal2;
trianglesToDraw++;
}
m_triangles.DeallocateAllMarked();
return(trianglesToDraw);
}
