ref: a829fc8b5a2ab396fe46ffbe8c01dcdb9d3038f6
parent: 68941726957810d31765772e7d0ddb380d1a5f41
author: rodri <rgl@antares-labs.eu>
date: Tue Jun 20 05:56:17 EDT 2023
isometric: rewritten to use the new rframe xforms from libgeometry.
--- a/isometric.c
+++ b/isometric.c
@@ -49,64 +49,30 @@
Point spacegrid[10][10];
int showgrid;
-Point2
-rfxform(Point2 p, RFrame rf)
-{- Matrix m = {- rf.bx.x, rf.by.x, 0,
- rf.bx.y, rf.by.y, 0,
- 0, 0, 1
- };
- invm(m);
- return xform(subpt2(p, rf.p), m);
-}
-
-Point2
-invrfxform(Point2 p, RFrame rf)
-{- Matrix m = {- rf.bx.x, rf.by.x, 0,
- rf.bx.y, rf.by.y, 0,
- 0, 0, 1
- };
- return addpt2(xform(p, m), rf.p);
-}
-
-Point2
-fromscreen(Point p)
-{- return invrfxform(Pt2(p.x,p.y,1), screenrf);
-}
-
Point
-toscreen(Point2 p)
+fromworld(Point2 p)
{- p = rfxform(p, screenrf);
+ p = invrframexform(p, worldrf);
return Pt(p.x,p.y);
}
Point2
-fromworld(Point2 p)
+toworld(Point p)
{- return invrfxform(p, worldrf);
+ return rframexform(Pt2(p.x,p.y,1), worldrf);
}
-Point2
-toworld(Point2 p)
-{- return rfxform(p, worldrf);
-}
-
-Point2
+Point
fromtile(Point2 p)
{- return invrfxform(p, tilerf);
+ p = invrframexform(p, tilerf);
+ return Pt(p.x,p.y);
}
Point2
-totile(Point2 p)
+totile(Point p)
{- return rfxform(p, tilerf);
+ return rframexform(Pt2(p.x,p.y,1), tilerf);
}
void
@@ -142,7 +108,7 @@
for(i = 0; i < nelem(spacegrid); i++)
for(j = 0; j < nelem(spacegrid[i]); j++)
- spacegrid[i][j] = toscreen(fromworld(Pt2(j, i, 1)));
+ spacegrid[i][j] = fromworld(Pt2(j, i, 1));
}
void
@@ -151,7 +117,7 @@
Point2 mp, p;
char s[256];
- mp = toworld(fromscreen(mpos));
+ mp = toworld(mpos);
snprint(s, sizeof s, "Global %v", mp);
stringbg(screen, addpt(screen->r.min, Pt(20,20)), pal[Cfg], ZP, font, s, pal[Ctxtbg], ZP);
p = Pt2(fmod(mp.x,1),fmod(mp.y,1),1);
@@ -160,7 +126,7 @@
p = Pt2((int)mp.x,(int)mp.y,1);
snprint(s, sizeof s, "Cell %v", p);
stringbg(screen, addpt(screen->r.min, Pt(20,20+font->height*2)), pal[Cfg], ZP, font, s, pal[Ctxtbg], ZP);
- p = totile(fromscreen(mpos));
+ p = totile(mpos);
snprint(s, sizeof s, "Tile %v", p);
stringbg(screen, addpt(screen->r.min, Pt(20,20+font->height*3)), pal[Cfg], ZP, font, s, pal[Ctxtbg], ZP);
}
@@ -181,7 +147,7 @@
{Point p;
- p = toscreen(fromtile(cell));
+ p = fromtile(cell);
p.y -= Dy(t->img->r) - TH; /* XXX hack to draw overheight tile sprites */
draw(screen, Rpt(p,addpt(p, Pt(TW,Dy(t->img->r)))), t->img, nil, ZP);
}
@@ -201,7 +167,7 @@
if(tiles[j].id == *row)
drawtile(&tiles[j], dp);
}
- dp = toworld(fromscreen(mpos));
+ dp = toworld(mpos);
dp.x = (int)dp.x;
dp.y = (int)dp.y;
drawtile(tfocus, dp);
@@ -218,7 +184,7 @@
Point cell;
char buf[2];
- mp = toworld(fromscreen(mpos));
+ mp = toworld(mpos);
if(mp.x < 0 || mp.y < 0)
return;
cell.x = mp.x;
@@ -284,9 +250,6 @@
sysfatal("initdraw: %r");initpalette();
inittiles();
- screenrf.p = Pt2(0,0,1);
- screenrf.bx = Vec2(1,0);
- screenrf.by = Vec2(0,1);
worldrf.p = Pt2(screen->r.min.x+Dx(screen->r)/2,screen->r.min.y+Dy(screen->r)/3,1);
worldrf.bx = Vec2(TW/2,TH/2);
worldrf.by = Vec2(TW/2,-TH/2);