private void DrawTriangle(Vertex v1, Vertex v2, Vertex v3)
{
//var v1 = primitive.Vertices[triangle.Vertex1];
//var v2 = primitive.Vertices[triangle.Vertex2];
//var v3 = primitive.Vertices[triangle.Vertex3];
var vec1 = new Vector4(v1.X, v1.Y, v1.Z, 1);
var vec2 = new Vector4(v2.X, v2.Y, v2.Z, 1);
var vec3 = new Vector4(v3.X, v3.Y, v3.Z, 1);
Vector3f faceNormal = Math3D.CalculateNormal(Math3D.ConvertToDecart(vec1), Math3D.ConvertToDecart(vec2), Math3D.ConvertToDecart(vec3));
var worldCoord1 = _modelMatrix * new Vector4(v1.X, v1.Y, v1.Z, 1);
var worldCoord2 = _modelMatrix * new Vector4(v2.X, v2.Y, v2.Z, 1);
var worldCoord3 = _modelMatrix * new Vector4(v3.X, v3.Y, v3.Z, 1);
ShaderProgram.ComputeVertex(new VertexInput {
Position = new Vector4(v1.X, v1.Y, v1.Z, 1), Normal = (Vector4)faceNormal
});
ShaderProgram.ComputeVertex(new VertexInput {
Position = new Vector4(v1.X, v1.Y, v1.Z, 1), Normal = (Vector4)faceNormal
});
ShaderProgram.ComputeVertex(new VertexInput {
Position = new Vector4(v1.X, v1.Y, v1.Z, 1), Normal = (Vector4)faceNormal
});
Draw3D.SimpleRasterizeTriangle(
ConvertToScreenCoord0(decartvector1),
ConvertToScreenCoord0(decartvector2),
ConvertToScreenCoord0(decartvector3),
FrameBuffer,
Color.FromArgb((int)(255 * Restrict(sampleColor.X)), (int)(255 * Restrict(sampleColor.Y)), (int)(255 * Restrict(sampleColor.Z))),
_zBuffer);
}
public void ComputeVertex(VertexInput v1)
{
#region Завернуть в шейдер
var worldCoord1 = _modelMatrix * v1.Position;
var vector1 = _transformMatrix * worldCoord1;
//var vector2 = _transformMatrix * worldCoord2;
//var vector3 = _transformMatrix * worldCoord3;
var decartvector1 = Math3D.ConvertToDecart(vector1);
//var decartvector2 = Math3D.ConvertToDecart(vector2);
//var decartvector3 = Math3D.ConvertToDecart(vector3);
//Vector3f faceNormalInWorldCoord = Math3D.CalculateNormal(Math3D.ConvertToDecart(worldCoord1), Math3D.ConvertToDecart(worldCoord2), Math3D.ConvertToDecart(worldCoord3));
Vector3f faceNormalInProjectionCoord = SimpleRender.Math.Vector3f.CrossProductLeft((decartvector3 - decartvector1), (decartvector2 - decartvector1));
faceNormalInProjectionCoord = faceNormalInProjectionCoord.Normalize();
var viewDirection = new Vector4(0, 0, -1, 1);
double intensity = Math3D.DotProduct(faceNormalInProjectionCoord, viewDirection);
//TODO Подумать нужноли это в шейдере
if (intensity <= 0)
{
continue;
}
//ambient = Ka,
//diffuse = Kd * cos(N, L),
//specular = Ks * pow(cos(R, V), Ns),
//intensity = ambient + amp * (diffuse + specular).
//-----------------
//http://www.gamedev.ru/code/articles/HLSL?page=4
//Lighting:
//Lambert (ambient lighting)
//Diffuse (diffuse lighting model)
//Phong (specular lighting model), Blinn (blinn specular lighting model)
//Sum of this
//Реалистичное освещение на основе Кука-Торренса
//-------------
var ligthSource = scene.LightSources.First();
var globalLightPosition = ligthSource.Position.Normalize();
double illuminationIntensity = Math3D.DotProduct(faceNormalInWorldCoord, globalLightPosition);
var diffuseColor = new Vector4(
_material.DiffuseColor.X * ligthSource.Color.X,
_material.Mategial.DiffuseColor.Y * ligthSource.Color.Y,
_material.Mategial.DiffuseColor.Z * ligthSource.Color.Z,
1)
* illuminationIntensity;
//var reflection = (Vector3f.CrossProductLeft(faceNormalInWorldCoord ,
// (Vector3f.CrossProductLeft(faceNormalInWorldCoord ,globalLightPosition) * 2.0f)) -
// globalLightPosition).Normalize(); // reflected light
var sampleColor = _ambientColor + diffuseColor * ligthSource.Intensity;
#endregion
}
public void Render(Scene scene)
{
//TransformedVector = TranslationMatrix * RotationMatrix * ScaleMatrix * OriginalVector;
//MVPmatrix = projection * view * model;
double[] zBuffer = new double[_screenWidth * _screenHeight];
var rnd = new Random();
var cvvMatrix = Math3D.GetPerspectiveMatrix(100, _halfScreenWidth / _halfscreenHeight, 0.3d, 1000d);
foreach (var primitive in scene.Objects)
{
var rotationMatrix = Math3D.GetRotationMatrix(
primitive.Rotation.X,
primitive.Rotation.Y,
primitive.Rotation.Z);
var translationMatrix = Math3D.GetTranslationMatrix(primitive.Position.X, primitive.Position.Y, primitive.Position.Z);
var scaleMatrix = Math3D.GetScaleMatrix(1, 1, 1);
var modelMatrix = translationMatrix * (rotationMatrix * scaleMatrix);
var viewMatrix = Math3D.GetViewMatrix(new Vector3f(0f, 1.2f, -2f), new Vector3f(0, 0f, 0f));
var transformMatrix = cvvMatrix * viewMatrix;// * modelMatrix;
foreach (var triangle in primitive.Faces)
{
var v1 = primitive.Vertices[triangle.Vertex1];
var v2 = primitive.Vertices[triangle.Vertex2];
var v3 = primitive.Vertices[triangle.Vertex3];
//TODO Здесь нужен вызов фрагментного шейдера
//shader.Set(v1,v2,v3) shader.Compute()
#region Завернуть в шейдер
var worldCoord1 = modelMatrix * new Vector4(v1.X, v1.Y, v1.Z, 1);
var worldCoord2 = modelMatrix * new Vector4(v2.X, v2.Y, v2.Z, 1);
var worldCoord3 = modelMatrix * new Vector4(v3.X, v3.Y, v3.Z, 1);
var vector1 = transformMatrix * worldCoord1;
var vector2 = transformMatrix * worldCoord2;
var vector3 = transformMatrix * worldCoord3;
var decartvector1 = Math3D.ConvertToDecart(vector1);
var decartvector2 = Math3D.ConvertToDecart(vector2);
var decartvector3 = Math3D.ConvertToDecart(vector3);
Vector3f faceNormalInWorldCoord = Math3D.CalculateNormal(Math3D.ConvertToDecart(worldCoord1), Math3D.ConvertToDecart(worldCoord2), Math3D.ConvertToDecart(worldCoord3));
Vector3f faceNormalInProjectionCoord = SimpleRender.Math.Vector3f.CrossProductLeft((decartvector3 - decartvector1), (decartvector2 - decartvector1));
faceNormalInProjectionCoord = faceNormalInProjectionCoord.Normalize();
var viewDirection = new Vector4(0, 0, -1, 1);
double intensity = Math3D.DotProduct(faceNormalInProjectionCoord, viewDirection);
//TODO Подумать нужноли это в шейдере
if (intensity <= 0)
{
continue;
}
//ambient = Ka,
//diffuse = Kd * cos(N, L),
//specular = Ks * pow(cos(R, V), Ns),
//intensity = ambient + amp * (diffuse + specular).
//-----------------
//http://www.gamedev.ru/code/articles/HLSL?page=4
//Lighting:
//Lambert (ambient lighting)
//Diffuse (diffuse lighting model)
//Phong (specular lighting model), Blinn (blinn specular lighting model)
//Sum of this
//Реалистичное освещение на основе Кука-Торренса
//-------------
var ligthSource = scene.LightSources.First();
var globalLightPosition = ligthSource.Position.Normalize();
double illuminationIntensity = Math3D.DotProduct(faceNormalInWorldCoord, globalLightPosition);
var diffuseColor = new Vector4(
primitive.Mategial.DiffuseColor.X * ligthSource.Color.X,
primitive.Mategial.DiffuseColor.Y * ligthSource.Color.Y,
primitive.Mategial.DiffuseColor.Z * ligthSource.Color.Z,
1)
* illuminationIntensity;
//var reflection = (Vector3f.CrossProductLeft(faceNormalInWorldCoord ,
// (Vector3f.CrossProductLeft(faceNormalInWorldCoord ,globalLightPosition) * 2.0f)) -
// globalLightPosition).Normalize(); // reflected light
var sampleColor = scene.AmbientColor + diffuseColor * ligthSource.Intensity;
#endregion
Draw3D.SimpleRasterizeTriangle(
ConvertToScreenCoord0(decartvector1),
ConvertToScreenCoord0(decartvector2),
ConvertToScreenCoord0(decartvector3),
Image,
Color.FromArgb((int)(255 * Restrict(sampleColor.X)), (int)(255 * Restrict(sampleColor.Y)), (int)(255 * Restrict(sampleColor.Z))),
zBuffer);
}
}
}
