public SceneGenerator SelectGenerator(int floor, int seed)
{
// for testing
//return new SceneGeneratorIce(this, floor);
List <Func <SceneGenerator> > gens = new List <Func <SceneGenerator> >
{
() => new SceneGeneratorJungle(this, floor),
() => new SceneGeneratorLava(this, floor),
() => new SceneGeneratorIce(this, floor)
};
Mathg.Shuffle(new Random(seed), gens);
gens.Insert(0, () => new SceneGeneratorDefault(this, floor));
return(gens[((floor - 1) / 4) % gens.Count].Invoke());
}
public void Raster(Scene scene)
{
Camera camera = scene.Camera;
// Reset console
for (int i = 0; i < console.Width; i++)
{
for (int j = 0; j < console.Height; j++)
{
console.Data[i, j] = ' ';
console.Color[i, j] = 255;
zBuffer[i, j] = 1;
bBuffer[i, j] = Vector3.Zero;
tBuffer[i, j] = null;
}
}
List <Triangle> triangles = new List <Triangle>();
ASCII_FPS.triangleCount = 0;
ASCII_FPS.triangleCountClipped = 0;
ASCII_FPS.zonesRendered = 0;
// Extract dynamic meshes
Matrix cameraSpaceMatrix = camera.CameraSpaceMatrix;
foreach (GameObject gameObject in scene.gameObjects)
{
MeshObject mesh = gameObject.MeshObject;
ASCII_FPS.triangleCount += mesh.triangles.Count;
Matrix meshToCameraMatrix = mesh.WorldSpaceMatrix * cameraSpaceMatrix;
foreach (Triangle triangle in mesh.triangles)
{
Vector3 v0 = Vector3.Transform(triangle.V0, meshToCameraMatrix);
Vector3 v1 = Vector3.Transform(triangle.V1, meshToCameraMatrix);
Vector3 v2 = Vector3.Transform(triangle.V2, meshToCameraMatrix);
triangles.Add(new Triangle(v0, v1, v2, triangle.Texture, triangle.UV0, triangle.UV1, triangle.UV2));
}
}
// Clipping
triangles = ClipTriangles(triangles, camera);
ASCII_FPS.triangleCountClipped += triangles.Count;
// Rendering
RenderTriangles(triangles, camera, 0, console.Width);
// Find first zone
Zone firstZone = null;
foreach (Zone zone in scene.zones)
{
if (zone.Bounds.TestPoint(new Vector2(camera.CameraPos.X, camera.CameraPos.Z)))
{
firstZone = zone;
break;
}
}
if (firstZone != null)
{
ProcessZone(camera, firstZone, 0, console.Width);
}
// Shading
for (int i = 0; i < console.Width; i++)
{
for (int j = 0; j < console.Height; j++)
{
Triangle triangle = tBuffer[i, j];
if (triangle != null)
{
float z = zBuffer[i, j];
Vector3 bar = bBuffer[i, j];
// Sample from texture
Vector2 uv = bar.X * triangle.UV0 + bar.Y * triangle.UV1 + bar.Z * triangle.UV2;
if (EyeEasy)
{
float d = Math.Clamp(1f - (float)Math.Pow(z, 25), 0f, 1f);
console.Data[i, j] = '@';
console.Color[i, j] = Mathg.ColorTo8Bit(triangle.Texture.Sample(uv) * d);
}
else
{
int fogId = (z < 0) ? 0 : Math.Min((int)(Math.Pow(z, 10) * fogString.Length + offset[i, j]), fogString.Length - 1);
console.Data[i, j] = fogString[fogId];
console.Color[i, j] = Mathg.ColorTo8Bit(triangle.Texture.Sample(uv));
}
}
}
}
}
// Render triangles, only for pixels with x in [boundsLeft, boundsRight)
private void RenderTriangles(List <Triangle> triangles, Camera camera, int boundsLeft, int boundsRight)
{
Matrix projectionMatrix = camera.ProjectionMatrix;
foreach (Triangle triangle in triangles)
{
Vector4 v0 = Vector4.Transform(new Vector4(triangle.V0, 1), projectionMatrix);
Vector4 v1 = Vector4.Transform(new Vector4(triangle.V1, 1), projectionMatrix);
Vector4 v2 = Vector4.Transform(new Vector4(triangle.V2, 1), projectionMatrix);
Vector2 p0 = new Vector2(v0.X, -v0.Y) / v0.W;
Vector2 p1 = new Vector2(v1.X, -v1.Y) / v1.W;
Vector2 p2 = new Vector2(v2.X, -v2.Y) / v2.W;
float z0 = v0.Z / v0.W;
float z1 = v1.Z / v1.W;
float z2 = v2.Z / v2.W;
float minX = Math.Min(p0.X, Math.Min(p1.X, p2.X));
float maxX = Math.Max(p0.X, Math.Max(p1.X, p2.X));
float minY = Math.Min(p0.Y, Math.Min(p1.Y, p2.Y));
float maxY = Math.Max(p0.Y, Math.Max(p1.Y, p2.Y));
int minI = Math.Max(boundsLeft, (int)((minX + 1f) * 0.5f * console.Width));
int maxI = Math.Min(boundsRight, (int)((maxX + 1f) * 0.5f * console.Width) + 1);
int minJ = Math.Max(0, (int)((minY + 1f) * 0.5f * console.Height));
int maxJ = Math.Min(console.Height, (int)((maxY + 1f) * 0.5f * console.Height) + 1);
// Four corners of rectangle
Vector2 topLeft = new Vector2(2f * minI / console.Width - 1f, 2f * minJ / console.Height - 1f);
Vector2 bottomLeft = new Vector2(2f * minI / console.Width - 1f, 2f * maxJ / console.Height - 1f);
Vector2 topRight = new Vector2(2f * maxI / console.Width - 1f, 2f * minJ / console.Height - 1f);
Vector2 bottomRight = new Vector2(2f * maxI / console.Width - 1f, 2f * maxJ / console.Height - 1f);
// Barycentric coordinates of corners
Vector3 barTopLeft = Mathg.Barycentric(topLeft, p0, p1, p2);
Vector3 barBottomLeft = Mathg.Barycentric(bottomLeft, p0, p1, p2);
Vector3 barTopRight = Mathg.Barycentric(topRight, p0, p1, p2);
Vector3 barBottomRight = Mathg.Barycentric(bottomRight, p0, p1, p2);
for (int i = minI; i < maxI; i++)
{
// Barycentric coordinates of points on top and bottom edge, interpolated from corners
float t = (float)(i - minI) / (maxI - minI);
Vector3 barTop = barTopLeft * (1 - t) + barTopRight * t;
Vector3 barBottom = barBottomLeft * (1 - t) + barBottomRight * t;
for (int j = minJ; j < maxJ; j++)
{
// Barycentric coordinates of point (i, j), interpolated from top and bottom
float t2 = (float)(j - minJ) / (maxJ - minJ);
Vector3 bar = barTop * (1 - t2) + barBottom * t2;
if (bar.X >= -0.01f && bar.Y >= -0.01f && bar.Z >= -0.01f)
{
float z = z0 * bar.X + z1 * bar.Y + z2 * bar.Z;
if (z > -1 && z < 1 && z < zBuffer[i, j])
{
zBuffer[i, j] = z;
tBuffer[i, j] = triangle;
bBuffer[i, j] = new Vector3(bar.X / v0.W, bar.Y / v1.W, bar.Z / v2.W)
/ (bar.X / v0.W + bar.Y / v1.W + bar.Z / v2.W);
}
}
}
}
}
}
