public void calculateRaster(float width, float height, bool isNDC)
{
polygons_raster = new List <RPolygon>();
foreach (RPolygon poly in polygons_proj)
{
RVertex vertex1 = new RVertex(poly.vertex0);
vertex1.position.x = isNDC ? (poly.v0.x + 1.0f) / 2.0f * width : poly.v0.x * width;
vertex1.position.y = isNDC ? (poly.v0.y + 1.0f) / 2.0f * height : poly.v0.y * height;
vertex1.textureCoordinates.x *= vertex1.position.z;
vertex1.textureCoordinates.y *= vertex1.position.z;
RVertex vertex2 = new RVertex(poly.vertex1);
vertex2.position.x = isNDC ? (poly.v1.x + 1.0f) / 2.0f * width : poly.v1.x * width;
vertex2.position.y = isNDC ? (poly.v1.y + 1.0f) / 2.0f * height : poly.v1.y * height;
vertex2.textureCoordinates.x *= vertex2.position.z;
vertex2.textureCoordinates.y *= vertex2.position.z;
RVertex vertex3 = new RVertex(poly.vertex2);
vertex3.position.x = isNDC ? (poly.v2.x + 1.0f) / 2.0f * width : poly.v2.x * width;
vertex3.position.y = isNDC ? (poly.v2.y + 1.0f) / 2.0f * height : poly.v2.y * height;
vertex3.textureCoordinates.x *= vertex3.position.z;
vertex3.textureCoordinates.y *= vertex3.position.z;
polygons_raster.Add(new RPolygon(vertex1, vertex2, vertex3, poly.rasterType, poly.texture));
}
}
public void calculateWorld()
{
polygons_world = new List <RPolygon>();
foreach (RPolygon poly in polygons_model)
{
RVertex vertex1 = new RVertex(poly.vertex[0]);
vertex1.position = new Vec3f(world * poly.v0);
RVertex vertex2 = new RVertex(poly.vertex[1]);
vertex2.position = new Vec3f(world * poly.v1);
RVertex vertex3 = new RVertex(poly.vertex[2]);
vertex3.position = new Vec3f(world * poly.v2);
polygons_world.Add(new RPolygon(vertex1, vertex2, vertex3, poly.rasterType, poly.texture));
}
}
public void calculateModel()
{
polygons_model = new List <RPolygon>();
foreach (RPolygon poly in polygons)
{
RVertex vertex1 = new RVertex(poly.vertex0);
vertex1.position = new Vec3f(model * poly.v0);
RVertex vertex2 = new RVertex(poly.vertex1);
vertex2.position = new Vec3f(model * poly.v1);
RVertex vertex3 = new RVertex(poly.vertex2);
vertex3.position = new Vec3f(model * poly.v2);
polygons_model.Add(new RPolygon(vertex1, vertex2, vertex3, poly.rasterType, poly.texture));
}
}
public void calculateProj(float nearPlane = 0.1f, float farPlane = 1000.0f)
{
polygons_proj = new List <RPolygon>();
foreach (RPolygon poly in polygons_view)
{
Vec3f nearPlaneNormal = new Vec3f(0.0f, 0.0f, 1.0f);
Vec3f nearPlaneP0 = new Vec3f(0.0f, 0.0f, nearPlane);
float sideOfPoint1 = nearPlaneNormal.dot(poly.vertex0.position - nearPlaneP0);
float sideOfPoint2 = nearPlaneNormal.dot(poly.vertex1.position - nearPlaneP0);
float sideOfPoint3 = nearPlaneNormal.dot(poly.vertex2.position - nearPlaneP0);
if (sideOfPoint1 <= 0 || sideOfPoint2 <= 0 || sideOfPoint3 <= 0)
{
poly.visible = false;
}
if (poly.visible)
{
RVertex vertex1 = new RVertex(poly.vertex0);
vertex1.position = new Vec3f(proj * poly.v0);
RVertex vertex2 = new RVertex(poly.vertex1);
vertex2.position = new Vec3f(proj * poly.v1);
RVertex vertex3 = new RVertex(poly.vertex2);
vertex3.position = new Vec3f(proj * poly.v2);
RPolygon newPolygon = new RPolygon(vertex1, vertex2, vertex3, poly.rasterType, poly.texture);
float cosTheta = newPolygon.normalCalc().dot(GlobalDirection.forward3f);
newPolygon.visible = cosTheta >= 0.0f ? false : true;
if (newPolygon.visible)
{
polygons_proj.Add(newPolygon);
}
}
}
}
public void calculateView(bool needToSort)
{
polygons_view = new List <RPolygon>();
foreach (RPolygon poly in polygons_world)
{
RVertex vertex1 = new RVertex(poly.vertex[0]);
vertex1.position = new Vec3f(view * poly.v0);
RVertex vertex2 = new RVertex(poly.vertex[1]);
vertex2.position = new Vec3f(view * poly.v1);
RVertex vertex3 = new RVertex(poly.vertex[2]);
vertex3.position = new Vec3f(view * poly.v2);
RPolygon newPolygon = new RPolygon(vertex1, vertex2, vertex3, poly.rasterType, poly.texture);
polygons_view.Add(newPolygon);
}
if (needToSort)
{
polygons_view = polygons_view.OrderBy(p => p.center).ToList();
}
}
public void calculateProj()
{
polygons_proj = new List <RPolygon>();
foreach (RPolygon poly in polygons_view)
{
RVertex vertex1 = new RVertex(poly.vertex[0]);
vertex1.position = new Vec3f(proj * poly.v0);
RVertex vertex2 = new RVertex(poly.vertex[1]);
vertex2.position = new Vec3f(proj * poly.v1);
RVertex vertex3 = new RVertex(poly.vertex[2]);
vertex3.position = new Vec3f(proj * poly.v2);
RPolygon newPolygon = new RPolygon(vertex1, vertex2, vertex3, poly.rasterType, poly.texture);
float cosTheta = newPolygon.normalCalc().dot(GlobalDirection.forward3f);
newPolygon.visible = cosTheta >= 0.0f ? false : true;
if (newPolygon.visible)
{
polygons_proj.Add(newPolygon);
}
}
}
public void calculateAll(float nearPlane, float farPlane, float width, float height, bool isNDC, bool backFaceCull = true)
{
polygons_raster = new List <RPolygon>();
object sync = new object();
Parallel.ForEach <RPolygon>(
polygons,
poly => {
Mat4f mwv = model;
mwv = mwv * world;
mwv = mwv * view;
RVertex vertex1 = new RVertex(poly.vertex0);
vertex1.position = new Vec3f(mwv * poly.v0);
RVertex vertex2 = new RVertex(poly.vertex1);
vertex2.position = new Vec3f(mwv * poly.v1);
RVertex vertex3 = new RVertex(poly.vertex2);
vertex3.position = new Vec3f(mwv * poly.v2);
Vec3f nearPlaneNormal = new Vec3f(0.0f, 0.0f, 1.0f);
Vec3f nearPlaneP0 = new Vec3f(0.0f, 0.0f, nearPlane);
Vec3f farPlaneNormal = new Vec3f(0.0f, 0.0f, -1.0f);
Vec3f farPlaneP0 = new Vec3f(0.0f, 0.0f, farPlane);
float sideOfPoint1near = nearPlaneNormal.dot(vertex1.position - nearPlaneP0);
float sideOfPoint2near = nearPlaneNormal.dot(vertex2.position - nearPlaneP0);
float sideOfPoint3near = nearPlaneNormal.dot(vertex3.position - nearPlaneP0);
float sideOfPoint1far = farPlaneNormal.dot(vertex1.position - farPlaneP0);
float sideOfPoint2far = farPlaneNormal.dot(vertex2.position - farPlaneP0);
float sideOfPoint3far = farPlaneNormal.dot(vertex3.position - farPlaneP0);
if ((sideOfPoint1near >= 0 && sideOfPoint2near >= 0 && sideOfPoint3near >= 0) && (sideOfPoint1far >= 0 && sideOfPoint2far >= 0 && sideOfPoint3far >= 0))
{
vertex1.position = new Vec3f(proj * vertex1.position);
vertex2.position = new Vec3f(proj * vertex2.position);
vertex3.position = new Vec3f(proj * vertex3.position);
vertex1.position.x = isNDC ? (vertex1.position.x + 1.0f) * 0.5f * width : vertex1.position.x * width;
vertex1.position.y = isNDC ? (vertex1.position.y + 1.0f) * 0.5f * height : vertex1.position.y * height;
vertex2.position.x = isNDC ? (vertex2.position.x + 1.0f) * 0.5f * width : vertex2.position.x * width;
vertex2.position.y = isNDC ? (vertex2.position.y + 1.0f) * 0.5f * height : vertex2.position.y * height;
vertex3.position.x = isNDC ? (vertex3.position.x + 1.0f) * 0.5f * width : vertex3.position.x * width;
vertex3.position.y = isNDC ? (vertex3.position.y + 1.0f) * 0.5f * height : vertex3.position.y * height;
RPolygon newPolygon = new RPolygon(vertex1, vertex2, vertex3, poly.rasterType, poly.texture);
float cosTheta = newPolygon.normalCalc().dot(GlobalDirection.forward3f);
newPolygon.visible = cosTheta >= 0.0f ? false : true;
if (!backFaceCull || newPolygon.visible)
{
newPolygon.sort();
lock (sync) {
polygons_raster.Add(newPolygon);
}
}
}
}
);
}