/// <summary> /// Draws a billboard in world space facing the +Z direction of the matrix specified. Units in meters, matrix /// transform notwithstanding. /// </summary> public void Draw(ref CroppedBox box, MatrixD[] matrixRef) { FlatQuad quad = new FlatQuad() { Point0 = box.bounds.Max, Point1 = new Vector2(box.bounds.Max.X, box.bounds.Min.Y), Point2 = box.bounds.Min, Point3 = new Vector2(box.bounds.Min.X, box.bounds.Max.Y), }; if (skewRatio != 0f) { Vector2 start = quad.Point0, end = quad.Point3, offset = (end - start) * skewRatio * .5f; quad.Point0 = Vector2.Lerp(start, end, skewRatio) - offset; quad.Point3 = Vector2.Lerp(start, end, 1f + skewRatio) - offset; quad.Point1 -= offset; quad.Point2 -= offset; } BillBoardUtils.AddQuad(ref quad, ref materialData, matrixRef, box.mask); }
/// <summary> /// Queues a quad billboard for rendering /// </summary> public static void AddQuad(ref FlatQuad quad, ref BoundedQuadMaterial mat, MatrixD[] matrixRef, BoundingBox2?mask = null) { var bbPool = instance.bbPoolBack; var bbDataBack = instance.flatTriangleList; var matList = instance.matrixBuf; var matTable = instance.matrixTable; // Find matrix index in table or add it int matrixID; if (!matTable.TryGetValue(matrixRef, out matrixID)) { matrixID = matList.Count; matList.Add(matrixRef[0]); matTable.Add(matrixRef, matrixID); } // Mask bounding check. Null mask if not intersecting. BoundingBox2? maskBox = mask; ContainmentType containment = ContainmentType.Contains; if (maskBox != null) { BoundingBox2 bounds = new BoundingBox2(quad.Point2, quad.Point0); maskBox.Value.Contains(ref bounds, out containment); if (containment == ContainmentType.Contains) { maskBox = null; } } if (containment != ContainmentType.Disjoint) { int indexL = bbDataBack.Count, indexR = bbDataBack.Count + 1; var bbL = new FlatTriangleBillboardData { Item1 = BlendTypeEnum.PostPP, Item2 = new Vector2I(bbDataBack.Count, matrixID), Item3 = mat.textureID, Item4 = new MyTuple <Vector4, BoundingBox2?>(mat.bbColor, maskBox), Item5 = new MyTuple <Vector2, Vector2, Vector2> ( new Vector2(mat.texBounds.Max.X, mat.texBounds.Min.Y), // 1 mat.texBounds.Max, // 0 new Vector2(mat.texBounds.Min.X, mat.texBounds.Max.Y) // 3 ), Item6 = new MyTuple <Vector2, Vector2, Vector2> ( quad.Point0, quad.Point1, quad.Point2 ), }; var bbR = new FlatTriangleBillboardData { Item1 = BlendTypeEnum.PostPP, Item2 = new Vector2I(bbDataBack.Count + 1, matrixID), Item3 = mat.textureID, Item4 = new MyTuple <Vector4, BoundingBox2?>(mat.bbColor, maskBox), Item5 = new MyTuple <Vector2, Vector2, Vector2> ( new Vector2(mat.texBounds.Max.X, mat.texBounds.Min.Y), // 1 new Vector2(mat.texBounds.Min.X, mat.texBounds.Max.Y), // 3 mat.texBounds.Min // 2 ), Item6 = new MyTuple <Vector2, Vector2, Vector2> ( quad.Point0, quad.Point2, quad.Point3 ), }; bbDataBack.Add(bbL); bbDataBack.Add(bbR); if (indexR >= bbPool.Count) { instance.AddNewBB(indexR - (bbPool.Count - 1)); } MyTransparentGeometry.AddBillboard(bbPool[indexL], false); MyTransparentGeometry.AddBillboard(bbPool[indexR], false); } }