void RenderGraphObject(GraphObject graphObject, RenderFlags renderFlags)
{
// visibility check
if (!graphObject.Visible)
{
return;
}
// render-flag check
if (!renderFlags.HasFlag(RenderFlags.Ceilings) && graphObject.HasRenderFlag(GraphObjectRenderFlags.Ceiling))
{
return;
}
if (!renderFlags.HasFlag(RenderFlags.FourthWalls) && graphObject.HasRenderFlag(GraphObjectRenderFlags.FourthWall))
{
return;
}
// matrix transformations
GL.PushMatrix();
TransformMatrix(graphObject.Position, graphObject.Rotation, graphObject.Scale);
// bounding box
if (renderFlags.HasFlag(RenderFlags.BoundingBox))
{
GL.Disable(EnableCap.Lighting);
GL.Disable(EnableCap.Texture2D);
GL.Color3(Color.Yellow);
GLUtility.WireCube(graphObject.BoundingBox * GlobalScaleReciprocal);
GL.Color3(Color.White);
GL.Enable(EnableCap.Texture2D);
GL.Enable(EnableCap.Lighting);
}
if (graphObject.HasRenderFlag(GraphObjectRenderFlags.FullBright))
{
GL.Disable(EnableCap.Lighting);
}
// Render parts.
foreach (var part in graphObject)
{
if (shaders[part.ShaderIndex].Tint.A > 0 && ((shaders[part.ShaderIndex].Tint.A == Color.Opaque && renderFlags.HasFlag(RenderFlags.Opaque)) || (shaders[part.ShaderIndex].Tint.A < Color.Opaque && renderFlags.HasFlag(RenderFlags.Translucent))))
{
RenderPart(part, renderFlags);
}
}
GL.Enable(EnableCap.Lighting);
// Render children.
for (int childIndex = graphObject.ChildIndex; childIndex >= 0; childIndex = graphObjects[childIndex].NextIndex)
{
RenderGraphObject(graphObjects[childIndex], renderFlags);
}
GL.PopMatrix();
}
void RenderGrid(int gridSize)
{
GL.Disable(EnableCap.Lighting);
GLUtility.DisableTexture2D();
GL.Begin(BeginMode.Lines);
for (int z = -gridSize; z <= gridSize; z++)
{
GL.Color3(Color.White);
GL.Vertex3(-gridSize, 0.0f, z);
GL.Vertex3(gridSize, 0.0f, z);
}
for (int x = -gridSize; x <= gridSize; x++)
{
GL.Color3(Color.White);
GL.Vertex3(x, 0.0f, -gridSize);
GL.Vertex3(x, 0.0f, gridSize);
}
GL.End();
GLUtility.EnableTexture2D();
GL.Enable(EnableCap.Lighting);
}
void RenderPart(Part part, RenderFlags renderFlags)
{
GL.Material(MaterialFace.Front, MaterialParameter.Diffuse, shaders[part.ShaderIndex].Tint.ToColor4());
var batch = batches[part.BatchIndex];
if (batch.UseNBT) // Render with bump map.
{
int binormalAttribute = GL.GetAttribLocation(Program.EmbossProgram, "inBinormal");
int tangentAttribute = GL.GetAttribLocation(Program.EmbossProgram, "inTangent");
int diffuseMap = GL.GetUniformLocation(Program.EmbossProgram, "diffuseMap");
int bumpMap = GL.GetUniformLocation(Program.EmbossProgram, "bumpMap");
int embossFactor = GL.GetUniformLocation(Program.EmbossProgram, "embossScale");
Program.EmbossProgram.Use();
GL.ActiveTexture(TextureUnit.Texture0 + 0);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, glTextures[materials[shaders[part.ShaderIndex].MaterialIndex[0]].textureIndex]);
GLUtility.SetTexture2DWrapModeS(materials[shaders[part.ShaderIndex].MaterialIndex[0]].wrapS);
GLUtility.SetTexture2DWrapModeT(materials[shaders[part.ShaderIndex].MaterialIndex[0]].wrapT);
GL.Uniform1(diffuseMap, 0);
GL.ActiveTexture(TextureUnit.Texture0 + 1);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, glTextures[materials[shaders[part.ShaderIndex].MaterialIndex[1]].textureIndex]);
GLUtility.SetTexture2DWrapModeS(materials[shaders[part.ShaderIndex].MaterialIndex[1]].wrapS);
GLUtility.SetTexture2DWrapModeT(materials[shaders[part.ShaderIndex].MaterialIndex[1]].wrapT);
GL.Uniform1(bumpMap, 1);
GL.Uniform1(embossFactor, 2.0f);
foreach (var primitive in batch)
{
GL.Begin(primitive.GLType);
foreach (var vertex in primitive)
{
GL.MultiTexCoord2(TextureUnit.Texture0 + 0, ref texCoord0s[vertex.UVIndex[0].Value]);
GL.MultiTexCoord2(TextureUnit.Texture0 + 1, ref texCoord1s[vertex.UVIndex[1].Value]);
GL.Normal3(normals[vertex.NormalIndex.Value]);
GL.VertexAttrib3(tangentAttribute, ref normals[vertex.BinormalIndex.Value + 1]);
GL.VertexAttrib3(binormalAttribute, ref normals[vertex.TangentIndex.Value + 2]);
GL.Vertex3(positions[vertex.PositionIndex.Value]);
}
GL.End();
}
GL.UseProgram(0);
}
else // Render without bump map.
{
for (int texUnit = 0; texUnit < 8; texUnit++)
{
if (shaders[part.ShaderIndex].MaterialIndex[texUnit] < 0)
{
continue;
}
var material = materials[shaders[part.ShaderIndex].MaterialIndex[texUnit]];
GL.ActiveTexture(TextureUnit.Texture0 + texUnit);
GL.Enable(EnableCap.Texture2D);
GL.BindTexture(TextureTarget.Texture2D, glTextures[material.textureIndex]);
GLUtility.SetTexture2DWrapModeS(material.wrapS);
GLUtility.SetTexture2DWrapModeT(material.wrapT);
}
foreach (var primitive in batch)
{
GL.Begin(primitive.GLType);
foreach (var vertex in primitive)
{
if (vertex.UVIndex[0] != null)
{
GL.MultiTexCoord2(TextureUnit.Texture0, ref texCoord0s[vertex.UVIndex[0].Value]);
}
if (vertex.NormalIndex != null)
{
GL.Normal3(normals[vertex.NormalIndex.Value]);
}
GL.Vertex3(positions[vertex.PositionIndex.Value]);
}
GL.End();
}
}
GLUtility.DisableTexture2D();
// normals
if (renderFlags.HasFlag(RenderFlags.NBT))
{
const float normalLength = 0.0625f;
GL.Disable(EnableCap.Lighting);
GL.Begin(BeginMode.Lines);
foreach (var primitive in batch)
{
foreach (var vertex in primitive)
{
if (vertex.NormalIndex != null)
{
GL.Color4(Color.Red.ToColor4());
GL.Vertex3(positions[vertex.PositionIndex.Value]);
GL.Vertex3(positions[vertex.PositionIndex.Value] + normals[vertex.NormalIndex.Value] * normalLength);
}
if (vertex.TangentIndex != null)
{
GL.Color4(Color.Green.ToColor4());
GL.Vertex3(positions[vertex.PositionIndex.Value]);
GL.Vertex3(positions[vertex.PositionIndex.Value] + normals[vertex.TangentIndex.Value + 2] * normalLength);
}
if (vertex.BinormalIndex != null)
{
GL.Color4(Color.Blue.ToColor4());
GL.Vertex3(positions[vertex.PositionIndex.Value]);
GL.Vertex3(positions[vertex.PositionIndex.Value] + normals[vertex.BinormalIndex.Value + 1] * normalLength);
}
}
}
GL.End();
GL.Enable(EnableCap.Lighting);
}
}
void Render()
{
// Refresh.
GL.ClearColor(0.0f, 0.0f, 0.0f, 1.0f);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
// Enable crap.
GL.Enable(EnableCap.Blend);
GL.Enable(EnableCap.CullFace);
GL.Enable(EnableCap.DepthTest);
GL.Enable(EnableCap.LineSmooth);
GLUtility.EnableTexture2D();
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
GL.FrontFace(FrontFaceDirection.Cw);
GL.Hint(HintTarget.LineSmoothHint, HintMode.Nicest);
GL.LineWidth(1.0f);
GL.PolygonMode(MaterialFace.Front, polygonMode);
GL.ShadeModel(ShadingModel.Smooth);
// Set the viewpoint.
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
Matrix4 cameraMatrix = CameraMatrix;
GL.Rotate(camera.rot.Z, Vector3.UnitZ);
GL.Rotate(camera.rot.X, Vector3.UnitX);
GL.Rotate(camera.rot.Y, Vector3.UnitY);
GL.Scale(1.0f, 1.0f, 1.0f);
GL.MultMatrix(ref cameraMatrix);
// Set up lighting.
GL.Enable(EnableCap.Lighting);
GL.Light(LightName.Light0, LightParameter.Ambient, new Color(127).ToColor4());
GL.Light(LightName.Light0, LightParameter.Position, new Vector4(camera.pos.ToVector3(), 1.0f));
GL.Enable(EnableCap.Light0);
// Render models (opaque first, then translucent).
if (HasModelsLoaded)
{
RenderFlags flags = RenderFlags.None;
if (showBoundingBoxes)
{
flags |= RenderFlags.BoundingBox;
}
if (showCeilings)
{
flags |= RenderFlags.Ceilings;
}
if (showFourthWalls)
{
flags |= RenderFlags.FourthWalls;
}
if (showNBT)
{
flags |= RenderFlags.NBT;
}
loadedModels.ForEach(model => model.Render(RenderFlags.Opaque | flags));
loadedModels.ForEach(model => model.Render(RenderFlags.Translucent | flags));
}
// Render grid.
if (showGrid)
{
RenderGrid(20);
}
// Swap the front and back buffers.
gl_frame.SwapBuffers();
}