private void generateVertices(float initialSize)
{
this.Meshes = new Mesh[1];
this.Materials = new Material[1];
List <TexturedVertex> verticesList = new List <TexturedVertex>();
// Top
verticesList.Add(new TexturedVertex(new Vector3(initialSize, initialSize, -initialSize), Color4.Green, new Vector3(0, 1, 0))); // top right
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, initialSize, -initialSize), Color4.Green, new Vector3(0, 1, 0))); // top left
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, initialSize, initialSize), Color4.Green, new Vector3(0, 1, 0))); // bottom left
verticesList.Add(new TexturedVertex(new Vector3(initialSize, initialSize, initialSize), Color4.Green, new Vector3(0, 1, 0))); // bottom right
// Bottom
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, -initialSize, -initialSize), Color4.Orange, new Vector3(0, -1, 0))); // top left
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, -initialSize, initialSize), Color4.Orange, new Vector3(0, -1, 0))); // bottom left
verticesList.Add(new TexturedVertex(new Vector3(initialSize, -initialSize, initialSize), Color4.Orange, new Vector3(0, -1, 0))); // bottom right
verticesList.Add(new TexturedVertex(new Vector3(initialSize, -initialSize, -initialSize), Color4.Orange, new Vector3(0, -1, 0))); // top right
// Front
verticesList.Add(new TexturedVertex(new Vector3(initialSize, initialSize, initialSize), Color4.Red, new Vector3(0, 0, 1))); // top right
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, initialSize, initialSize), Color4.Red, new Vector3(0, 0, 1))); // top left
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, -initialSize, initialSize), Color4.Red, new Vector3(0, 0, 1))); // bottom left
verticesList.Add(new TexturedVertex(new Vector3(initialSize, -initialSize, initialSize), Color4.Red, new Vector3(0, 0, 1))); // bottom right
// Back
verticesList.Add(new TexturedVertex(new Vector3(initialSize, initialSize, -initialSize), Color4.Yellow, new Vector3(0, 0, -1))); // top right
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, initialSize, -initialSize), Color4.Yellow, new Vector3(0, 0, -1))); // top left
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, -initialSize, -initialSize), Color4.Yellow, new Vector3(0, 0, -1))); // bottom left
verticesList.Add(new TexturedVertex(new Vector3(initialSize, -initialSize, -initialSize), Color4.Yellow, new Vector3(0, 0, -1))); // bottom right
// Left
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, initialSize, initialSize), Color4.Blue, new Vector3(-1, 0, 0))); // top right
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, initialSize, -initialSize), Color4.Blue, new Vector3(-1, 0, 0))); // top left
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, -initialSize, -initialSize), Color4.Blue, new Vector3(-1, 0, 0))); // bottom left
verticesList.Add(new TexturedVertex(new Vector3(-initialSize, -initialSize, initialSize), Color4.Blue, new Vector3(-1, 0, 0))); // bottom right
// Right
verticesList.Add(new TexturedVertex(new Vector3(initialSize, initialSize, initialSize), Color4.Magenta, new Vector3(1, 0, 0))); // top right
verticesList.Add(new TexturedVertex(new Vector3(initialSize, initialSize, -initialSize), Color4.Magenta, new Vector3(1, 0, 0))); // top left
verticesList.Add(new TexturedVertex(new Vector3(initialSize, -initialSize, -initialSize), Color4.Magenta, new Vector3(1, 0, 0))); // bottom left
verticesList.Add(new TexturedVertex(new Vector3(initialSize, -initialSize, initialSize), Color4.Magenta, new Vector3(1, 0, 0))); // bottom right
List <ushort> indices = new List <ushort>()
{
0, 1, 2, 0, 2, 3, // top
4, 5, 6, 4, 6, 7, // bottom
8, 9, 10, 8, 10, 11, // front
12, 13, 14, 12, 14, 15, // back
16, 17, 18, 16, 18, 19, // left
20, 21, 22, 20, 22, 23 // right
};
Mesh.Primitive shapePrimitive = new Mesh.Primitive(verticesList, indices);
this.Meshes[0] = new Mesh(shapePrimitive);
this.Materials[0] = new Material(0, Color4.Red, new Color4(255, 100, 100, 255), 2);
}
private void generateVertices(float width, float height)
{
this.Meshes = new Mesh[1];
this.Materials = new Material[1];
List <TexturedVertex> verticesList = new List <TexturedVertex>();
verticesList.Add(new TexturedVertex(new Vector3(width, 0, -height), Color4.White, new Vector3(0, 1, 0))); // top right
verticesList.Add(new TexturedVertex(new Vector3(-width, 0, -height), Color4.White, new Vector3(0, 1, 0))); // top left
verticesList.Add(new TexturedVertex(new Vector3(-width, 0, height), Color4.White, new Vector3(0, 1, 0))); // bottom left
verticesList.Add(new TexturedVertex(new Vector3(width, 0, height), Color4.White, new Vector3(0, 1, 0))); // bottom right
List <ushort> indices = new List <ushort>()
{
0, 1, 2, 0, 2, 3
};
Mesh.Primitive shapePrimitive = new Mesh.Primitive(verticesList, indices);
this.Meshes[0] = new Mesh(shapePrimitive);
this.Materials[0] = new Material(0, Color4.White, Color4.White, 16);
}
public virtual void GenerateVertices(int recursionLevel, bool perFaceLighting, float size, Texture diffuseTexture = null, Texture specularTexture = null, IShapeDecorator decorator = null)
{
this.Meshes = new Mesh[1];
this.Materials = new Material[1];
List <TexturedVertex> verticesList = new List <TexturedVertex>();
this.middlePointIndexCache = new Dictionary <long, int>();
this.points = new List <Vector3>();
this.index = 0;
float t = (float)((1.0 + Math.Sqrt(5.0)) / 2.0);
float s = 1;
List <Face> faces = new List <Face>();
this.addVertex(new Vector3(-s, t, 0));
this.addVertex(new Vector3(s, t, 0));
this.addVertex(new Vector3(-s, -t, 0));
this.addVertex(new Vector3(s, -t, 0));
this.addVertex(new Vector3(0, -s, t));
this.addVertex(new Vector3(0, s, t));
this.addVertex(new Vector3(0, -s, -t));
this.addVertex(new Vector3(0, s, -t));
this.addVertex(new Vector3(t, 0, -s));
this.addVertex(new Vector3(t, 0, s));
this.addVertex(new Vector3(-t, 0, -s));
this.addVertex(new Vector3(-t, 0, s));
// 5 faces around point 0
faces.Add(new Face(this.points[0], this.points[11], this.points[5]));
faces.Add(new Face(this.points[0], this.points[5], this.points[1]));
faces.Add(new Face(this.points[0], this.points[1], this.points[7]));
faces.Add(new Face(this.points[0], this.points[7], this.points[10]));
faces.Add(new Face(this.points[0], this.points[10], this.points[11]));
// 5 adjacent faces
faces.Add(new Face(this.points[1], this.points[5], this.points[9]));
faces.Add(new Face(this.points[5], this.points[11], this.points[4]));
faces.Add(new Face(this.points[11], this.points[10], this.points[2]));
faces.Add(new Face(this.points[10], this.points[7], this.points[6]));
faces.Add(new Face(this.points[7], this.points[1], this.points[8]));
// 5 faces around point 3
faces.Add(new Face(this.points[3], this.points[9], this.points[4]));
faces.Add(new Face(this.points[3], this.points[4], this.points[2]));
faces.Add(new Face(this.points[3], this.points[2], this.points[6]));
faces.Add(new Face(this.points[3], this.points[6], this.points[8]));
faces.Add(new Face(this.points[3], this.points[8], this.points[9]));
// 5 adjacent faces
faces.Add(new Face(this.points[4], this.points[9], this.points[5]));
faces.Add(new Face(this.points[2], this.points[4], this.points[11]));
faces.Add(new Face(this.points[6], this.points[2], this.points[10]));
faces.Add(new Face(this.points[8], this.points[6], this.points[7]));
faces.Add(new Face(this.points[9], this.points[8], this.points[1]));
// refine triangles
for (int i = 0; i < recursionLevel; i++)
{
var faces2 = new List <Face>();
foreach (Face tri in faces)
{
// replace triangle by 4 triangles
int a = this.getMiddlePoint(tri.V1, tri.V2);
int b = this.getMiddlePoint(tri.V2, tri.V3);
int c = this.getMiddlePoint(tri.V3, tri.V1);
faces2.Add(new Face(tri.V1, this.points[a], this.points[c]));
faces2.Add(new Face(tri.V2, this.points[b], this.points[a]));
faces2.Add(new Face(tri.V3, this.points[c], this.points[b]));
faces2.Add(new Face(this.points[a], this.points[b], this.points[c]));
}
faces = faces2;
}
foreach (Face tri in faces)
{
Vector3 V1 = tri.V1;
Vector3 V2 = tri.V2;
Vector3 V3 = tri.V3;
V1 = Vector3.Multiply(V1, size);
V2 = Vector3.Multiply(V2, size);
V3 = Vector3.Multiply(V3, size);
if (decorator != null)
{
decorator.ApplyFace(ref V1, ref V2, ref V3);
}
Vector2 uv1 = V1.GetSphereCoord();
Vector2 uv2 = V2.GetSphereCoord();
Vector2 uv3 = V3.GetSphereCoord();
this.fixColorStrip(ref uv1, ref uv2, ref uv3);
if (perFaceLighting)
{
Vector3 dir = Vector3.Cross(V2 - V1, V3 - V1);
Vector3 normal = Vector3.Normalize(dir);
verticesList.Add(new TexturedVertex(V1, uv1, Color4.White, normal));
verticesList.Add(new TexturedVertex(V2, uv2, Color4.White, normal));
verticesList.Add(new TexturedVertex(V3, uv3, Color4.White, normal));
}
else
{
Vector3 normalV1 = V1.Normalized();
normalV1 = Vector3.Divide(normalV1, normalV1.Length);
Vector3 normalV2 = V2.Normalized();
normalV2 = Vector3.Divide(normalV2, normalV2.Length);
Vector3 normalV3 = V3.Normalized();
normalV3 = Vector3.Divide(normalV3, normalV3.Length);
verticesList.Add(new TexturedVertex(V1, uv1, Color4.White, normalV1));
verticesList.Add(new TexturedVertex(V2, uv2, Color4.White, normalV2));
verticesList.Add(new TexturedVertex(V3, uv3, Color4.White, normalV3));
}
}
Mesh.Primitive shapePrimitive = new Mesh.Primitive(verticesList);
this.Meshes[0] = new Mesh(shapePrimitive);
if (diffuseTexture != null)
{
if (specularTexture != null)
{
this.Materials[0] = new Material(0, diffuseTexture, specularTexture, 2);
}
else
{
this.Materials[0] = new Material(0, diffuseTexture, Color4.LightGoldenrodYellow, 2);
}
this.Materials[0].AmbientColor = Color4.DarkBlue;
}
else
{
this.Materials[0] = new Material(0, Color4.Blue, Color4.White, 2);
this.Materials[0].AmbientColor = Color4.Blue;
}
Logger.Info("Completed sphere generation! Generated vertices: " + verticesList.Count);
}
private Mesh getMesh(JObject nodeJson)
{
int meshId = (int)nodeJson["mesh"];
JObject meshJson = (JObject)_json["meshes"][meshId];
List <Mesh.Primitive> primitives = new List <Mesh.Primitive>();
foreach (JObject primitiveJson in (JArray)meshJson["primitives"])
{
// Material
int materialId = (int)primitiveJson["material"];
// Geometry
if (primitiveJson["mode"] == null || (GLTFPrimitiveMode)(int)primitiveJson["mode"] != GLTFPrimitiveMode.TRIANGLES)
{
throw new Exception($"Found unsupported primitive mode {(int)primitiveJson["mode"]} for {meshId}, only TRIANGLES (4) is supported.");
}
int positionAttributeAccessorId = (int)primitiveJson["attributes"]["POSITION"];
var positionAccessor = _json["accessors"][positionAttributeAccessorId];
int verticesCount = (int)positionAccessor["count"];
TexturedVertex[] staticVertices = new TexturedVertex[verticesCount];
JToken accessor, bufferView;
int sourceOffset, stride;
BinaryReader buffer;
// Position
accessor = positionAccessor;
if ((GLTFConst)(int)accessor["componentType"] != GLTFConst.FLOAT)
{
throw new Exception($"Found unexpected component type {(int)accessor["componentType"]} for POSITION attribute of {meshId}, FLOAT was expected.");
}
bufferView = _json["bufferViews"][(int)accessor["bufferView"]];
int accessorByteOffset = (accessor["byteOffset"] != null) ? (int)accessor["byteOffset"] : 0;
int bufferViewByteOffset = (bufferView["byteOffset"] != null) ? (int)bufferView["byteOffset"] : 0;
sourceOffset = bufferViewByteOffset + accessorByteOffset;
stride = (bufferView["byteStride"] != null) ? (int)bufferView["byteStride"] : sizeof(float) * 3;
buffer = _buffers[(int)bufferView["buffer"]];
for (var i = 0; i < verticesCount; i++)
{
buffer.BaseStream.Position = sourceOffset + stride * i;
var position = new Vector3(buffer.ReadSingle(), buffer.ReadSingle(), buffer.ReadSingle());
staticVertices[i].Position = position;
staticVertices[i].Color = Color4.White;
}
// Normals
int normalAttributeAccessorId = (int)primitiveJson["attributes"]["NORMAL"];
var normalAccessor = _json["accessors"][normalAttributeAccessorId];
accessor = normalAccessor;
if ((GLTFConst)(int)accessor["componentType"] != GLTFConst.FLOAT)
{
throw new Exception($"Found unexpected component type {(int)accessor["componentType"]} for NORMAL attribute of {meshId}, FLOAT was expected.");
}
bufferView = _json["bufferViews"][(int)accessor["bufferView"]];
accessorByteOffset = (accessor["byteOffset"] != null) ? (int)accessor["byteOffset"] : 0;
bufferViewByteOffset = (bufferView["byteOffset"] != null) ? (int)bufferView["byteOffset"] : 0;
sourceOffset = bufferViewByteOffset + accessorByteOffset;
stride = (bufferView["byteStride"] != null) ? (int)bufferView["byteStride"] : sizeof(float) * 3;
buffer = _buffers[(int)bufferView["buffer"]];
for (var i = 0; i < verticesCount; i++)
{
buffer.BaseStream.Position = sourceOffset + stride * i;
staticVertices[i].Normal = new Vector3(buffer.ReadSingle(), buffer.ReadSingle(), buffer.ReadSingle());
}
// Texture coordinates
if (primitiveJson["attributes"]["TEXCOORD_0"] != null)
{
int attributeAccessorId = (int)primitiveJson["attributes"]["TEXCOORD_0"];
if (primitiveJson["attributes"]["TEXCOORD_1"] != null)
{
throw new Exception("Dual textures primitives are not supported");
}
accessor = _json["accessors"][attributeAccessorId];
if ((GLTFConst)(int)accessor["componentType"] != GLTFConst.FLOAT)
{
throw new Exception($"Found unexpected component type {(int)accessor["componentType"]} for TEXCOORD_0 attribute of {meshId}, FLOAT was expected.");
}
bufferView = _json["bufferViews"][(int)accessor["bufferView"]];
accessorByteOffset = (accessor["byteOffset"] != null) ? (int)accessor["byteOffset"] : 0;
bufferViewByteOffset = (bufferView["byteOffset"] != null) ? (int)bufferView["byteOffset"] : 0;
sourceOffset = bufferViewByteOffset + accessorByteOffset;
stride = (bufferView["byteStride"] != null) ? (int)bufferView["byteStride"] : sizeof(float) * 2;
buffer = _buffers[(int)bufferView["buffer"]];
for (var i = 0; i < verticesCount; i++)
{
buffer.BaseStream.Position = sourceOffset + stride * i;
staticVertices[i].TextureCoord = new Vector2(buffer.ReadSingle(), buffer.ReadSingle());
}
}
// Indices
ushort[] indices = new ushort[0];
if (primitiveJson["indices"] != null)
{
int indicesAccessorId = (int)primitiveJson["indices"];
var indicesAccessor = _json["accessors"][indicesAccessorId];
indices = new ushort[(int)indicesAccessor["count"]];
accessor = indicesAccessor;
bufferView = _json["bufferViews"][(int)accessor["bufferView"]];
accessorByteOffset = (accessor["byteOffset"] != null) ? (int)accessor["byteOffset"] : 0;
bufferViewByteOffset = (bufferView["byteOffset"] != null) ? (int)bufferView["byteOffset"] : 0;
sourceOffset = bufferViewByteOffset + accessorByteOffset;
buffer = _buffers[(int)bufferView["buffer"]];
for (var i = 0; i < indices.Length; i++)
{
buffer.BaseStream.Position = sourceOffset + sizeof(ushort) * i;
indices[i] = buffer.ReadUInt16();
}
}
Mesh.Primitive primitive = new Mesh.Primitive(staticVertices.ToList(), indices.ToList());
primitive.MaterialModelId = materialId;
primitives.Add(primitive);
}
Mesh mesh = new Mesh(primitives.ToArray());
if (nodeJson["matrix"] != null)
{
JArray m = (JArray)nodeJson["matrix"];
Matrix4 initialMatrix = new Matrix4((float)m[0], (float)m[1], (float)m[2], (float)m[3], (float)m[4], (float)m[5], (float)m[6], (float)m[7], (float)m[8], (float)m[9], (float)m[10], (float)m[11], (float)m[12], (float)m[13], (float)m[14], (float)m[15]);
mesh.LocalMatrix = initialMatrix;
}
if (nodeJson["name"] != null)
{
mesh.Name = (string)nodeJson["name"];
}
return(mesh);
}
