diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 49 |
1 files changed, 32 insertions, 17 deletions
@@ -770,20 +770,6 @@ shade(Framebuf *fb, Shader *s) chanfree(donec); } -Point3 -ivshader(VSparams *sp) -{ - Matrix3 M, V; - - identity3(M); - identity3(V); - mulm3(M, rota); - mulm3(V, view); - mulm3(V, M); - - return xform3(*sp->p, V); -} - Memimage * triangleshader(FSparams *sp) { @@ -819,16 +805,17 @@ Memimage * circleshader(FSparams *sp) { Point2 uv; - double r; + double r, d; uchar cbuf[4]; uv = Pt2(sp->p.x,sp->p.y,1); uv.x /= Dx(sp->su->fb->r); uv.y /= Dy(sp->su->fb->r); // r = 0.3; - r = 0.3*sin(sp->su->uni_time/1e9); + r = 0.3*fabs(sin(sp->su->uni_time/1e9)); + d = vec2len(subpt2(uv, Vec2(0.5,0.5))); - if(vec2len(subpt2(uv, Vec2(0.5,0.5))) > r) + if(d > r + r*0.05 || d < r - r*0.05) return nil; cbuf[0] = 0xFF; @@ -898,6 +885,33 @@ boxshader(FSparams *sp) return sp->frag; } +Point3 +ivshader(VSparams *sp) +{ + Matrix3 M, V, S = { + scale, 0, 0, 0, + 0, scale, 0, 0, + 0, 0, scale, 0, + 0, 0, 0, 1, + }; + + identity3(M); + identity3(V); + mulm3(M, rota); + mulm3(M, S); + mulm3(V, view); + mulm3(V, M); + + return xform3(*sp->p, V); +} + +Memimage * +identshader(FSparams *sp) +{ + memfillcolor(sp->frag, *(ulong*)sp->cbuf); + return sp->frag; +} + Shader shadertab[] = { { "triangle", ivshader, triangleshader }, { "circle", ivshader, circleshader }, @@ -905,6 +919,7 @@ Shader shadertab[] = { { "sf", ivshader, sfshader }, { "gouraud", vertshader, gouraudshader }, { "toon", vertshader, toonshader }, + { "ident", vertshader, identshader }, }; Shader * getshader(char *name) |