public bool RayIntersects(Ray ray, SurfaceModelMesh model, out float distance)
{
distance = float.NaN;
var vertices = Vertices;
var indices = Indices;
var localRay = Ray.Transform(ray, model.Transform.Inverted());
for (int i = 0; i < model.IndexCount; i += 3)
{
var idx1 = indices[i + model.StartIndex];
var idx2 = indices[i + 1 + model.StartIndex];
var idx3 = indices[i + 2 + model.StartIndex];
var v1 = vertices[idx1 + model.StartVertex];
var v2 = vertices[idx2 + model.StartVertex];
var v3 = vertices[idx3 + model.StartVertex];
if (Ray.IntersectsTriangle(localRay, v1.Position, v2.Position, v3.Position, out float hitDist))
{
distance = float.IsNaN(distance) ? hitDist : Math.Min(hitDist, distance);
}
}
return(!float.IsNaN(distance));
}
private void DrawSolidModel(SurfaceModelMesh model, MaterialInfo material)
{
RenderHelper.BeginDrawModel(VertexBuffer, model.Transform, material);
RenderHelper.ModelShader.IsSelected.Set(model.IsSelected);
DrawModelElements(model);
RenderHelper.EndDrawModel(VertexBuffer);
}
private void DrawModelElements(SurfaceModelMesh model)
{
VertexBuffer.DrawElementsBaseVertex(PrimitiveType.Triangles,
model.StartVertex,
model.IndexCount,
model.StartIndex * 4);
}
private void RenderPartialMesh(MeshRenderMode renderMode, SurfaceModelMesh model, MaterialInfo material)
{
if (renderMode == MeshRenderMode.Wireframe && model.IsSelected)
{
//in wireframe mode, disable depth and color mask
//but still write in stencil mask, this is needed for drawing the selection outline correctly
GL.ColorMask(false, false, false, false);
GL.DepthMask(false);
}
if (renderMode != MeshRenderMode.Wireframe || model.IsSelected)
{
DrawSolidModel(model, material);
}
if (model.IsSelected)
{
RenderHelper.DisableStencilMask();
}
if (renderMode == MeshRenderMode.Wireframe && model.IsSelected)
{
GL.ColorMask(true, true, true, true);
GL.DepthMask(true);
}
if (renderMode == MeshRenderMode.Wireframe || renderMode == MeshRenderMode.SolidWireframe)
{
var wireColor = model.IsSelected && renderMode == MeshRenderMode.SolidWireframe ? RenderHelper.WireframeColorAlt : RenderHelper.WireframeColor;
DrawWireframeModel(model, wireColor, 1f);
}
}
private SurfaceModelMesh AddMeshGeometry(ModelMeshReference modelMesh, List <int> indexList, List <VertVNT> vertexList)
{
var geometry = modelMesh.GetGeometry();
int indexOffset = indexList.Count;
int vertexOffset = vertexList.Count;
var triangleIndices = geometry.GetTriangleIndices();
Vector3 minPos = new Vector3(9999f);
Vector3 maxPos = new Vector3(-9999f);
indexList.AddRange(triangleIndices);
foreach (var vertex in geometry.Vertices)
{
var glVertex = new VertVNT()
{
Position = vertex.Position.ToGL(),
Normal = vertex.Normal.ToGL(),
TexCoord = geometry.IsTextured ? vertex.TexCoord.ToGL() : Vector2.Zero
};
minPos = Vector3.ComponentMin(minPos, glVertex.Position);
maxPos = Vector3.ComponentMax(maxPos, glVertex.Position);
vertexList.Add(glVertex);
}
var model = new SurfaceModelMesh(this, modelMesh, indexOffset, geometry.IndexCount, vertexOffset);
model.BoundingBox = BBox.FromMinMax(minPos, maxPos);
MeshModels.Add(model);
return(model);
}
private void DrawWireframeModel(SurfaceModelMesh model, Vector4 color, float thickness)
{
RenderHelper.BeginDrawWireframe(VertexBuffer, model.Transform, thickness, color);
DrawModelElements(model);
RenderHelper.EndDrawWireframe(VertexBuffer);
}