public DrawingSurface Render(VxlFile vxl, HvaFile hva, GameObject obj, DrawProperties props)
{
if (!_isInit)
{
Initialize();
}
if (!_canRender)
{
Logger.Warn("Not rendering {0} because no OpenGL context could be obtained", vxl.FileName);
return(null);
}
Logger.Debug("Rendering voxel {0}", vxl.FileName);
vxl.Initialize();
hva.Initialize();
GL.Viewport(0, 0, _surface.BitmapData.Width, _surface.BitmapData.Height);
GL.Clear(ClearBufferMask.DepthBufferBit | ClearBufferMask.ColorBufferBit);
// RA2 uses dimetric projection with camera elevated 30° off the ground
GL.MatrixMode(MatrixMode.Projection);
var persp = Matrix4.CreatePerspectiveFieldOfView(MathHelper.DegreesToRadians(30), _surface.BitmapData.Width / (float)_surface.BitmapData.Height, 1, _surface.BitmapData.Height);
GL.LoadMatrix(ref persp);
GL.MatrixMode(MatrixMode.Modelview);
#if DEBUG
/*
* GL.PushMatrix();
* GL.LineWidth(4);
* GL.Color3(Color.Red);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(-100, 0, 0);
* GL.Vertex3(100, 0, 0);
* GL.End();
* GL.Color3(Color.Green);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(0, -100, 0);
* GL.Vertex3(0, 100, 0);
* GL.End();
* GL.Color3(Color.White);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(0, 0, -100);
* GL.Vertex3(0, 0, 100);
* GL.End();
* GL.PopMatrix();*/
#endif
var lookat = Matrix4.LookAt(0, 0, -10, 0, 0, 0, 0, 1, 0);
GL.LoadMatrix(ref lookat);
GL.Translate(0, 0, 10);
float direction = (obj is OwnableObject) ? (obj as OwnableObject).Direction : 0;
float objectRotation = 45f - direction / 256f * 360f; // convert game rotation to world degrees
var world = Matrix4.CreateRotationX(MathHelper.DegreesToRadians(60));
world = Matrix4.CreateRotationY(MathHelper.DegreesToRadians(180)) * world; // this is how the game places voxels flat on the world
world = Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(objectRotation)) * world; // object facing
world = Matrix4.Scale(0.028f, 0.028f, 0.028f) * world;
// art.ini TurretOffset value positions some voxel parts over our x-axis
world = Matrix4.CreateTranslation(0.18f * props.TurretVoxelOffset, 0, 0) * world;
GL.MultMatrix(ref world);
// direction of light vector given by pitch & yaw
float pitch = MathHelper.DegreesToRadians(210);
float yaw = MathHelper.DegreesToRadians(120);
// helps to find good pitch/yaw
/*var colors = new[] { Color.Red, Color.Green, Color.Blue, Color.Yellow, Color.Orange, Color.Black, Color.Purple, Color.SlateBlue, Color.DimGray, Color.White, Color.Teal, Color.Tan };
* for (int i = 0; i < 360; i += 30) {
* for (int j = 0; j < 360; j += 30) {
* GL.Color3(colors[i / 30]);
* var shadowTransform2 =
* Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(210))
* Matrix4.CreateRotationY(MathHelper.DegreesToRadians(120));
* GL.LineWidth(2);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(0, 0, 0);
* GL.Vertex3(Vector3.Multiply(ExtractRotationVector(ToOpenGL(Matrix4.Invert(world * shadowTransform2))), 100f));
* GL.End();
* }
* }*/
var shadowTransform = Matrix4.CreateRotationZ(pitch) * Matrix4.CreateRotationY(yaw);
foreach (var section in vxl.Sections)
{
GL.PushMatrix();
var frameRot = hva.LoadGLMatrix(section.Index);
frameRot.M41 *= section.HVAMultiplier * section.ScaleX;
frameRot.M42 *= section.HVAMultiplier * section.ScaleY;
frameRot.M43 *= section.HVAMultiplier * section.ScaleZ;
var frameTransl = Matrix4.CreateTranslation(section.MinBounds);
var frame = frameTransl * frameRot;
GL.MultMatrix(ref frame);
// undo world transformations on light direction
var lightDirection = ExtractRotationVector(ToOpenGL(Matrix4.Invert(world * frame * shadowTransform)));
// draw line in direction light comes from
/*GL.Color3(Color.Red);
* GL.LineWidth(4f);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(0, 0, 0);
* GL.Vertex3(Vector3.Multiply(lightDirection, 100f));
* GL.End();*/
GL.Begin(BeginMode.Quads);
for (uint x = 0; x != section.SizeX; x++)
{
for (uint y = 0; y != section.SizeY; y++)
{
foreach (VxlFile.Voxel vx in section.Spans[x, y].Voxels)
{
Color color = obj.Palette.Colors[vx.ColorIndex];
Vector3 normal = section.GetNormal(vx.NormalIndex);
// shader function taken from https://github.com/OpenRA/OpenRA/blob/bleed/cg/vxl.fx
// thanks to pchote for a LOT of help getting it right
Vector3 colorMult = Vector3.Add(Ambient, Diffuse * Math.Max(Vector3.Dot(normal, lightDirection), 0f));
GL.Color3(
(byte)Math.Min(255, color.R * colorMult.X),
(byte)Math.Min(255, color.G * colorMult.Y),
(byte)Math.Min(255, color.B * colorMult.Z));
Vector3 vxlPos = Vector3.Multiply(new Vector3(x, y, vx.Z), section.Scale);
RenderVoxel(vxlPos);
/* draw line in normal direction
* if (r.Next(100) == 4) {
* float m = Math.Max(Vector3.Dot(normal, lightDirection), 0f);
* GL.Color3(m, m, m);
* GL.LineWidth(1);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(new Vector3(x, y, vx.Z));
* GL.Vertex3(new Vector3(x, y, vx.Z) + Vector3.Multiply(normal, 100f));
* GL.End();
* }*/
}
}
}
GL.End();
GL.PopMatrix();
}
// read pixels back to surface
GL.ReadPixels(0, 0, _surface.BitmapData.Width, _surface.BitmapData.Height, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, _surface.BitmapData.Scan0);
return(_surface);
}
public static Rectangle GetBounds(GameObject obj, VxlFile vxl, HvaFile hva, DrawProperties props)
{
vxl.Initialize();
hva.Initialize();
float direction = (obj is OwnableObject) ? (obj as OwnableObject).Direction : 0;
float objectRotation = 45f - direction / 256f * 360f; // convert game rotation to world degrees
var world = Matrix4.CreateRotationX(MathHelper.DegreesToRadians(60));
world = Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(objectRotation)) * world; // object facing
world = Matrix4.Scale(0.25f, 0.25f, 0.25f) * world;
// art.ini TurretOffset value positions some voxel parts over our x-axis
world = Matrix4.CreateTranslation(0.18f * props.TurretVoxelOffset, 0, 0) * world;
var camera = Matrix4.CreatePerspectiveFieldOfView(MathHelper.DegreesToRadians(30), 1f, 1, 100);
world = world * camera;
Rectangle ret = Rectangle.Empty;
foreach (var section in vxl.Sections)
{
var frameRot = hva.LoadGLMatrix(section.Index);
frameRot.M41 *= section.HVAMultiplier * section.ScaleX;
frameRot.M42 *= section.HVAMultiplier * section.ScaleY;
frameRot.M43 *= section.HVAMultiplier * section.ScaleZ;
var frameTransl = Matrix4.CreateTranslation(section.MinBounds);
var frame = frameTransl * frameRot * world;
// floor rect of the bounding box
Vector3 floorTopLeft = new Vector3(0, 0, 0);
Vector3 floorTopRight = new Vector3(section.SpanX, 0, 0);
Vector3 floorBottomRight = new Vector3(section.SpanX, section.SpanY, 0);
Vector3 floorBottomLeft = new Vector3(0, section.SpanY, 0);
// ceil rect of the bounding box
Vector3 ceilTopLeft = new Vector3(0, 0, section.SpanZ);
Vector3 ceilTopRight = new Vector3(section.SpanX, 0, section.SpanZ);
Vector3 ceilBottomRight = new Vector3(section.SpanX, section.SpanY, section.SpanZ);
Vector3 ceilBottomLeft = new Vector3(0, section.SpanY, section.SpanZ);
// apply transformations
floorTopLeft = Vector3.Transform(floorTopLeft, frame);
floorTopRight = Vector3.Transform(floorTopRight, frame);
floorBottomRight = Vector3.Transform(floorBottomRight, frame);
floorBottomLeft = Vector3.Transform(floorBottomLeft, frame);
ceilTopLeft = Vector3.Transform(ceilTopLeft, frame);
ceilTopRight = Vector3.Transform(ceilTopRight, frame);
ceilBottomRight = Vector3.Transform(ceilBottomRight, frame);
ceilBottomLeft = Vector3.Transform(ceilBottomLeft, frame);
int FminX = (int)Math.Floor(Math.Min(Math.Min(Math.Min(floorTopLeft.X, floorTopRight.X), floorBottomRight.X), floorBottomLeft.X));
int FmaxX = (int)Math.Ceiling(Math.Max(Math.Max(Math.Max(floorTopLeft.X, floorTopRight.X), floorBottomRight.X), floorBottomLeft.X));
int FminY = (int)Math.Floor(Math.Min(Math.Min(Math.Min(floorTopLeft.Y, floorTopRight.Y), floorBottomRight.Y), floorBottomLeft.Y));
int FmaxY = (int)Math.Ceiling(Math.Max(Math.Max(Math.Max(floorTopLeft.Y, floorTopRight.Y), floorBottomRight.Y), floorBottomLeft.Y));
int TminX = (int)Math.Floor(Math.Min(Math.Min(Math.Min(ceilTopLeft.X, ceilTopRight.X), ceilBottomRight.X), ceilBottomLeft.X));
int TmaxX = (int)Math.Ceiling(Math.Max(Math.Max(Math.Max(ceilTopLeft.X, ceilTopRight.X), ceilBottomRight.X), ceilBottomLeft.X));
int TminY = (int)Math.Floor(Math.Min(Math.Min(Math.Min(ceilTopLeft.Y, ceilTopRight.Y), ceilBottomRight.Y), ceilBottomLeft.Y));
int TmaxY = (int)Math.Ceiling(Math.Max(Math.Max(Math.Max(ceilTopLeft.Y, ceilTopRight.Y), ceilBottomRight.Y), ceilBottomLeft.Y));
int minX = Math.Min(FminX, TminX);
int maxX = Math.Max(FmaxX, TmaxX);
int minY = Math.Min(FminY, TminY);
int maxY = Math.Max(FmaxY, TmaxY);
ret = Rectangle.Union(ret, Rectangle.FromLTRB(minX, minY, maxX, maxY));
}
// return new Rectangle(-ret.Width / 2, -ret.Height / 2, ret.Width, ret.Height);
return(ret);
}
public DrawingSurface Render(VxlFile vxl, HvaFile hva, GameObject obj, DrawProperties props)
{
if (!_isInit)
{
Initialize();
}
if (!_canRender)
{
Logger.Warn("Not rendering {0} because no OpenGL context could be obtained", vxl.FileName);
return(null);
}
Logger.Debug("Rendering voxel {0}", vxl.FileName);
vxl.Initialize();
hva.Initialize();
GL.Viewport(0, 0, _surface.BitmapData.Width, _surface.BitmapData.Height);
GL.Clear(ClearBufferMask.DepthBufferBit | ClearBufferMask.ColorBufferBit);
// RA2 uses dimetric projection with camera elevated 30° off the ground
GL.MatrixMode(MatrixMode.Projection);
var persp = Matrix4.CreatePerspectiveFieldOfView(MathHelper.DegreesToRadians(30), _surface.BitmapData.Width / (float)_surface.BitmapData.Height, 1, _surface.BitmapData.Height);
GL.LoadMatrix(ref persp);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
var lookat = Matrix4.LookAt(0, 0, -10, 0, 0, 0, 0, 1, 0);
GL.MultMatrix(ref lookat);
var trans = Matrix4.CreateTranslation(0, 0, 10);
GL.MultMatrix(ref trans);
// align and zoom
var world = Matrix4.CreateRotationX(MathHelper.DegreesToRadians(60));
world = Matrix4.CreateRotationY(MathHelper.DegreesToRadians(180)) * world;
world = Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(-45)) * world;
world = Matrix4.Scale(0.028f, 0.028f, 0.028f) * world;
GL.MultMatrix(ref world);
// DrawAxes();
// determine tilt vectors
Matrix4 tilt = Matrix4.Identity;
int tiltPitch = 0, tiltYaw = 0;
if (obj.Tile.Drawable != null)
{
var img = (obj.Tile.Drawable as TileDrawable).GetTileImage(obj.Tile);
int ramp = img?.RampType ?? 0;
if (ramp == 0 || ramp >= 17)
{
tiltPitch = tiltYaw = 0;
}
else if (ramp <= 4)
{
// screen-diagonal facings (perpendicular to axes)
tiltPitch = 25;
tiltYaw = -90 * ramp;
}
else
{
// world-diagonal facings (perpendicular to screen)
tiltPitch = 25;
tiltYaw = 225 - 90 * ((ramp - 1) % 4);
}
tilt *= Matrix4.CreateRotationX(MathHelper.DegreesToRadians(tiltPitch));
tilt *= Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(tiltYaw));
/*// show tilt direction
* GL.Color3(Color.Black);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(Vector3.Zero);
* var tiltVec = Vector3.UnitZ;
* tiltVec = Vector3.Transform(tiltVec, tilt);
* tiltVec = Vector3.Multiply(tiltVec, 1000f);
* GL.Vertex3(tiltVec);
* GL.End();*/
}
/*// draw slope normals
* GL.LineWidth(2);
* var colors = new[] { Color.Red, Color.Green, Color.Blue, Color.Yellow, Color.Orange, Color.Black, Color.Purple, Color.SlateBlue, Color.DimGray, Color.White, Color.Teal, Color.Tan };
* for (int i = 0; i < 8; i++) {
* GL.Color3(colors[i]);
*
* const float roll = 25f;
* float syaw = 45f * i;
* var slopeNormal = Vector3.UnitZ;
* slopeNormal = Vector3.Transform(slopeNormal, Matrix4.CreateRotationX(MathHelper.DegreesToRadians(roll)));
* slopeNormal = Vector3.Transform(slopeNormal, Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(syaw)));
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(0, 0, 0);
* GL.Vertex3(Vector3.Multiply(slopeNormal, 1000f));
* GL.End();
* }*/
// object rotation around Z
float direction = (obj is OwnableObject) ? (obj as OwnableObject).Direction : 0;
float objectRotation = 90 - direction / 256f * 360f - tiltYaw; // convert game rotation to world degrees
Matrix4 @object = Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(objectRotation)) * tilt; // object facing
// art.ini TurretOffset value positions some voxel parts over our x-axis
@object = Matrix4.CreateTranslation(0.18f * props.TurretVoxelOffset, 0, 0) * @object;
GL.MultMatrix(ref @object);
// DrawAxes();
float pitch = MathHelper.DegreesToRadians(210);
float yaw = MathHelper.DegreesToRadians(120);
/*// helps to find good pitch/yaw
* // direction of light vector given by pitch & yaw
* for (int i = 0; i < 360; i += 30) {
* for (int j = 0; j < 360; j += 30) {
* GL.Color3(colors[i / 30]);
* var shadowTransform2 =
* Matrix4.CreateRotationZ(MathHelper.DegreesToRadians(i))
* Matrix4.CreateRotationY(MathHelper.DegreesToRadians(j));
* GL.LineWidth(2);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(0, 0, 0);
* GL.Vertex3(Vector3.Multiply(ExtractRotationVector(ToOpenGL(Matrix4.Invert(world * shadowTransform2))), 100f));
* GL.End();
* }
* }*/
var shadowTransform = Matrix4.CreateRotationZ(pitch) * Matrix4.CreateRotationY(yaw);
// clear shadowbuf
var shadBuf = _surface.GetShadows();
Array.Clear(shadBuf, 0, shadBuf.Length);
foreach (var section in vxl.Sections)
{
GL.PushMatrix();
var frameRot = hva.LoadGLMatrix(section.Index);
frameRot.M41 *= section.HVAMultiplier * section.ScaleX;
frameRot.M42 *= section.HVAMultiplier * section.ScaleY;
frameRot.M43 *= section.HVAMultiplier * section.ScaleZ;
var frameTransl = Matrix4.CreateTranslation(section.MinBounds);
var frame = frameTransl * frameRot;
GL.MultMatrix(ref frame);
var shadowScale = Matrix4.Scale(0.5f);
//var shadowTilt = null;
var shadowToScreen = frameTransl * shadowScale * frameRot * (@object * world) * trans * lookat;
// undo world transformations on light direction
var v = @object * world * frame * shadowTransform;
var lightDirection = (v.Determinant != 0.0) ? ExtractRotationVector(ToOpenGL(Matrix4.Invert(v))) : Vector3.Zero;
// draw line in direction light comes from
/*GL.Color3(Color.Red);
* GL.LineWidth(4f);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(0, 0, 0);
* GL.Vertex3(Vector3.Multiply(lightDirection, 100f));
* GL.End();*/
GL.Begin(BeginMode.Quads);
for (uint x = 0; x != section.SizeX; x++)
{
for (uint y = 0; y != section.SizeY; y++)
{
foreach (VxlFile.Voxel vx in section.Spans[x, y].Voxels)
{
Color color = obj.Palette.Colors[vx.ColorIndex];
Vector3 normal = section.GetNormal(vx.NormalIndex);
// shader function taken from https://github.com/OpenRA/OpenRA/blob/bleed/cg/vxl.fx
// thanks to pchote for a LOT of help getting it right
Vector3 colorMult = Vector3.Add(Ambient, Diffuse * Math.Max(Vector3.Dot(normal, lightDirection), 0f));
GL.Color3(
(byte)Math.Min(255, color.R * colorMult.X),
(byte)Math.Min(255, color.G * colorMult.Y),
(byte)Math.Min(255, color.B * colorMult.Z));
Vector3 vxlPos = Vector3.Multiply(new Vector3(x, y, vx.Z), section.Scale);
RenderVoxel(vxlPos);
var shadpos = new Vector3(x, y, 0);
var screenPos = Vector3.Transform(shadpos, shadowToScreen);
screenPos = Vector3.Transform(screenPos, persp);
screenPos.X /= screenPos.Z;
screenPos.Y /= screenPos.Z;
screenPos.X = (screenPos.X + 1) * _surface.Width / 2;
screenPos.Y = (screenPos.Y + 1) * _surface.Height / 2;
if (0 <= screenPos.X && screenPos.X < _surface.Width && 0 <= screenPos.Y && screenPos.Y < _surface.Height)
{
shadBuf[(int)screenPos.X + (_surface.Height - 1 - (int)screenPos.Y) * _surface.Width] = true;
}
/* draw line in normal direction
* if (r.Next(100) == 4) {
* float m = Math.Max(Vector3.Dot(normal, lightDirection), 0f);
* GL.Color3(m, m, m);
* GL.LineWidth(1);
* GL.Begin(BeginMode.Lines);
* GL.Vertex3(new Vector3(x, y, vx.Z));
* GL.Vertex3(new Vector3(x, y, vx.Z) + Vector3.Multiply(normal, 100f));
* GL.End();
* }*/
}
}
}
GL.End();
GL.PopMatrix();
}
// read pixels back to surface
GL.ReadPixels(0, 0, _surface.BitmapData.Width, _surface.BitmapData.Height, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, _surface.BitmapData.Scan0);
return(_surface);
}