358 lines
8.6 KiB
C#
358 lines
8.6 KiB
C#
|
|
#region ================== Copyright (c) 2007 Pascal vd Heiden
|
|
|
|
/*
|
|
* Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
|
|
* This program is released under GNU General Public License
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#endregion
|
|
|
|
#region ================== Namespaces
|
|
|
|
using System;
|
|
using CodeImp.DoomBuilder.Geometry;
|
|
|
|
#endregion
|
|
|
|
namespace CodeImp.DoomBuilder.Rendering
|
|
{
|
|
internal unsafe sealed class Plotter
|
|
{
|
|
#region ================== Constants
|
|
|
|
private const int DASH_INTERVAL = 16; //mxd
|
|
|
|
#endregion
|
|
|
|
#region ================== Variables
|
|
|
|
// Memory
|
|
private PixelColor* pixels;
|
|
private int width;
|
|
private int height;
|
|
private int visiblewidth;
|
|
private int visibleheight;
|
|
|
|
#endregion
|
|
|
|
#region ================== Properties
|
|
|
|
public int VisibleWidth { get { return visiblewidth; } }
|
|
public int VisibleHeight { get { return visibleheight; } }
|
|
public int Width { get { return width; } }
|
|
public int Height { get { return height; } }
|
|
|
|
#endregion
|
|
|
|
#region ================== Constructor / Disposer
|
|
|
|
// Constructor
|
|
public Plotter(PixelColor* pixels, int width, int height, int visiblewidth, int visibleheight)
|
|
{
|
|
// Initialize
|
|
this.pixels = pixels;
|
|
this.width = width;
|
|
this.height = height;
|
|
this.visiblewidth = width;
|
|
this.visibleheight = height;
|
|
|
|
// We have no destructor
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region ================== Pixel Rendering
|
|
|
|
// This clears all pixels black
|
|
public void Clear()
|
|
{
|
|
// Clear memory
|
|
General.ZeroMemory(new IntPtr(pixels), width * height * sizeof(PixelColor));
|
|
}
|
|
|
|
// This draws a pixel normally
|
|
public void DrawPixelSolid(int x, int y, ref PixelColor c)
|
|
{
|
|
// Draw pixel when within range
|
|
if((x >= 0) && (x < visiblewidth) && (y >= 0) && (y < visibleheight))
|
|
pixels[y * width + x] = c;
|
|
}
|
|
|
|
// This draws a pixel normally
|
|
public void DrawVertexSolid(int x, int y, int size, ref PixelColor c, ref PixelColor l, ref PixelColor d)
|
|
{
|
|
int x1 = x - size;
|
|
int x2 = x + size;
|
|
int y1 = y - size;
|
|
int y2 = y + size;
|
|
|
|
// Do unchecked?
|
|
if((x1 >= 0) && (x2 < visiblewidth) && (y1 >= 0) && (y2 < visibleheight))
|
|
{
|
|
// Filled square
|
|
for(int yp = y1; yp <= y2; yp++)
|
|
for(int xp = x1; xp <= x2; xp++)
|
|
pixels[yp * width + xp] = c;
|
|
|
|
// Vertical edges
|
|
for(int yp = y1 + 1; yp <= y2 - 1; yp++)
|
|
{
|
|
pixels[yp * width + x1] = l;
|
|
pixels[yp * width + x2] = d;
|
|
}
|
|
|
|
// Horizontal edges
|
|
for(int xp = x1 + 1; xp <= x2 - 1; xp++)
|
|
{
|
|
pixels[y1 * width + xp] = l;
|
|
pixels[y2 * width + xp] = d;
|
|
}
|
|
|
|
// Corners
|
|
pixels[y2 * width + x2] = d;
|
|
pixels[y1 * width + x1] = l;
|
|
}
|
|
/*
|
|
else
|
|
{
|
|
// Filled square
|
|
for(yp = y - size; yp <= y + size; yp++)
|
|
for(xp = x - size; xp <= x + size; xp++)
|
|
DrawPixelSolid(xp, yp, c);
|
|
|
|
// Vertical edges
|
|
for(yp = y - size + 1; yp <= y + size - 1; yp++)
|
|
{
|
|
DrawPixelSolid(x - size, yp, l);
|
|
DrawPixelSolid(x + size, yp, d);
|
|
}
|
|
|
|
// Horizontal edges
|
|
for(xp = x - size + 1; xp <= x + size - 1; xp++)
|
|
{
|
|
DrawPixelSolid(xp, y - size, l);
|
|
DrawPixelSolid(xp, y + size, d);
|
|
}
|
|
|
|
// Corners
|
|
DrawPixelSolid(x + size, y + size, d);
|
|
DrawPixelSolid(x - size, y - size, l);
|
|
}
|
|
*/
|
|
}
|
|
|
|
// This draws a dotted grid line horizontally
|
|
public void DrawGridLineH(int y, int x1, int x2, ref PixelColor c)
|
|
{
|
|
int numpixels = visiblewidth >> 1;
|
|
int offset = y & 0x01;
|
|
int ywidth = y * width;
|
|
x1 = General.Clamp(x1 >> 1, 0, numpixels - 1);
|
|
x2 = General.Clamp(x2 >> 1, 0, numpixels - 1);
|
|
|
|
if((y >= 0) && (y < height))
|
|
{
|
|
// Draw all pixels on this line
|
|
for(int i = x1; i < x2; i++) pixels[ywidth + ((i << 1) | offset)] = c;
|
|
}
|
|
}
|
|
|
|
// This draws a dotted grid line vertically
|
|
public void DrawGridLineV(int x, int y1, int y2, ref PixelColor c)
|
|
{
|
|
int numpixels = visibleheight >> 1;
|
|
int offset = x & 0x01;
|
|
y1 = General.Clamp(y1 >> 1, 0, numpixels - 1);
|
|
y2 = General.Clamp(y2 >> 1, 0, numpixels - 1);
|
|
|
|
if((x >= 0) && (x < width))
|
|
{
|
|
// Draw all pixels on this line
|
|
for(int i = y1; i < y2; i++) pixels[((i << 1) | offset) * width + x] = c;
|
|
}
|
|
}
|
|
|
|
// This draws a pixel alpha blended
|
|
public void DrawPixelAlpha(int x, int y, ref PixelColor c)
|
|
{
|
|
// Draw only when within range
|
|
if((x >= 0) && (x < visiblewidth) && (y >= 0) && (y < visibleheight))
|
|
{
|
|
// Get the target pixel
|
|
PixelColor* p = pixels + (y * width + x);
|
|
|
|
// Not drawn on target yet?
|
|
if(*(int*)p == 0)
|
|
{
|
|
// Simply apply color to pixel
|
|
*p = c;
|
|
}
|
|
else
|
|
{
|
|
// Blend with pixel
|
|
float a = c.a * 0.003921568627450980392156862745098f;
|
|
if(p->a + c.a > 255) p->a = 255; else p->a += c.a;
|
|
p->r = (byte)(p->r * (1f - a) + c.r * a);
|
|
p->g = (byte)(p->g * (1f - a) + c.g * a);
|
|
p->b = (byte)(p->b * (1f - a) + c.b * a);
|
|
}
|
|
}
|
|
}
|
|
|
|
// This draws a line normally
|
|
// See: http://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm
|
|
public void DrawLineSolid(int x1, int y1, int x2, int y2, ref PixelColor c)
|
|
{
|
|
// Check if the line is outside the screen for sure.
|
|
// This is quickly done by checking in which area both points are. When this
|
|
// is above, below, right or left of the screen, then skip drawing the line.
|
|
if(((x1 < 0) && (x2 < 0)) ||
|
|
((x1 > visiblewidth) && (x2 > visiblewidth)) ||
|
|
((y1 < 0) && (y2 < 0)) ||
|
|
((y1 > visibleheight) && (y2 > visibleheight))) return;
|
|
|
|
// Distance of the line
|
|
int dx = x2 - x1;
|
|
int dy = y2 - y1;
|
|
|
|
// Positive (absolute) distance
|
|
int dxabs = Math.Abs(dx);
|
|
int dyabs = Math.Abs(dy);
|
|
|
|
// Half distance
|
|
int x = dyabs >> 1;
|
|
int y = dxabs >> 1;
|
|
|
|
// Direction
|
|
int sdx = Math.Sign(dx);
|
|
int sdy = Math.Sign(dy);
|
|
|
|
// Start position
|
|
int px = x1;
|
|
int py = y1;
|
|
|
|
// When the line is completely inside screen,
|
|
// then do an unchecked draw, because all of its pixels are
|
|
// guaranteed to be within the memory range
|
|
if((x1 >= 0) && (x2 >= 0) && (x1 < visiblewidth) && (x2 < visiblewidth) &&
|
|
(y1 >= 0) && (y2 >= 0) && (y1 < visibleheight) && (y2 < visibleheight))
|
|
{
|
|
// Draw first pixel
|
|
pixels[py * width + px] = c;
|
|
|
|
// Check if the line is more horizontal than vertical
|
|
if(dxabs >= dyabs)
|
|
{
|
|
for(int i = 0; i < dxabs; i++)
|
|
{
|
|
y += dyabs;
|
|
if(y >= dxabs)
|
|
{
|
|
y -= dxabs;
|
|
py += sdy;
|
|
}
|
|
px += sdx;
|
|
|
|
// Draw pixel
|
|
pixels[py * width + px] = c;
|
|
}
|
|
}
|
|
// Else the line is more vertical than horizontal
|
|
else
|
|
{
|
|
for(int i = 0; i < dyabs; i++)
|
|
{
|
|
x += dxabs;
|
|
if(x >= dyabs)
|
|
{
|
|
x -= dyabs;
|
|
px += sdx;
|
|
}
|
|
py += sdy;
|
|
|
|
// Draw pixel
|
|
pixels[py * width + px] = c;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Draw first pixel
|
|
if((px >= 0) && (px < visiblewidth) && (py >= 0) && (py < visibleheight))
|
|
pixels[py * width + px] = c;
|
|
|
|
// Check if the line is more horizontal than vertical
|
|
if(dxabs >= dyabs)
|
|
{
|
|
for(int i = 0; i < dxabs; i++)
|
|
{
|
|
y += dyabs;
|
|
if(y >= dxabs)
|
|
{
|
|
y -= dxabs;
|
|
py += sdy;
|
|
}
|
|
px += sdx;
|
|
|
|
// Draw pixel
|
|
if((px >= 0) && (px < visiblewidth) && (py >= 0) && (py < visibleheight))
|
|
pixels[py * width + px] = c;
|
|
}
|
|
}
|
|
// Else the line is more vertical than horizontal
|
|
else
|
|
{
|
|
for(int i = 0; i < dyabs; i++)
|
|
{
|
|
x += dxabs;
|
|
if(x >= dyabs)
|
|
{
|
|
x -= dyabs;
|
|
px += sdx;
|
|
}
|
|
py += sdy;
|
|
|
|
// Draw pixel
|
|
if((px >= 0) && (px < visiblewidth) && (py >= 0) && (py < visibleheight))
|
|
pixels[py * width + px] = c;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//mxd
|
|
public void DrawLine3DFloor(Vector2D start, Vector2D end, ref PixelColor c, PixelColor c2)
|
|
{
|
|
Vector2D delta = end - start;
|
|
float length = delta.GetLength();
|
|
|
|
if(length < DASH_INTERVAL * 2)
|
|
{
|
|
DrawLineSolid((int)start.x, (int)start.y, (int)end.x, (int)end.y, ref c2);
|
|
}
|
|
else
|
|
{
|
|
float d1 = DASH_INTERVAL / length;
|
|
float d2 = 1.0f - d1;
|
|
|
|
Vector2D p1 = CurveTools.GetPointOnLine(start, end, d1);
|
|
Vector2D p2 = CurveTools.GetPointOnLine(start, end, d2);
|
|
|
|
DrawLineSolid((int)start.x, (int)start.y, (int)p1.x, (int)p1.y, ref c2);
|
|
DrawLineSolid((int)p1.x, (int)p1.y, (int)p2.x, (int)p2.y, ref c);
|
|
DrawLineSolid((int)p2.x, (int)p2.y, (int)end.x, (int)end.y, ref c2);
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|