diff options
| -rw-r--r-- | main.c | 141 |
1 files changed, 103 insertions, 38 deletions
@@ -108,34 +108,74 @@ max(int a, int b) //} Point3 -vertshader(VSparams *sp) +gouraudvshader(VSparams *sp) { - Point3 lightdir; - double intens; + static double Ka = 0.1; /* ambient factor */ + static double Ks = 0.5; /* specular factor */ + double Kd; /* diffuse factor */ + double spec; + Point3 pos, lightdir, lookdir; + Material m; + Color a, d, s; + Color ambient, diffuse, specular; - lightdir = normvec3(subpt3(light.p, center)); sp->v->n = qrotate(sp->v->n, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)); - intens = fmax(0, dotvec3(sp->v->n, lightdir)); - addvattr(sp->v, "intensity", VANumber, &intens); sp->v->p = qrotate(sp->v->p, Vec3(0,1,0), θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)); - return world2clip(maincam, model2world(sp->su->entity, sp->v->p)); + pos = model2world(sp->su->entity, sp->v->p); + if(sp->v->mtl != nil){ + a.r = sp->v->mtl->Ka.r; a.g = sp->v->mtl->Ka.g; a.b = sp->v->mtl->Ka.b; a.a = 1; + d.r = sp->v->mtl->Kd.r; d.g = sp->v->mtl->Kd.g; d.b = sp->v->mtl->Kd.b; d.a = 1; + s.r = sp->v->mtl->Ks.r; s.g = sp->v->mtl->Ks.g; s.b = sp->v->mtl->Ks.b; s.a = 1; + m.ambient = a; + m.diffuse = d; + m.specular = s; + m.shininess = sp->v->mtl->Ns; + + ambient = mulpt3(light.c, Ka); + ambient.r *= m.ambient.r; + ambient.g *= m.ambient.g; + ambient.b *= m.ambient.b; + ambient.a *= m.ambient.a; + + lightdir = normvec3(subpt3(light.p, pos)); + Kd = fmax(0, dotvec3(sp->v->n, lightdir)); + diffuse = mulpt3(light.c, Kd); + diffuse.r *= m.diffuse.r; + diffuse.g *= m.diffuse.g; + diffuse.b *= m.diffuse.b; + diffuse.a *= m.diffuse.a; + + lookdir = normvec3(subpt3(maincam->p, pos)); + lightdir = qrotate(lightdir, sp->v->n, PI); + spec = pow(fmax(0, dotvec3(lookdir, lightdir)), m.shininess); + specular = mulpt3(light.c, spec*Ks); + specular.r *= m.specular.r; + specular.g *= m.specular.g; + specular.b *= m.specular.b; + specular.a *= m.specular.a; + + sp->v->c = addpt3(ambient, addpt3(diffuse, specular)); + } + return world2clip(maincam, pos); } Color gouraudshader(FSparams *sp) { - Vertexattr *va; - Color c; + Color tc, c; - va = getvattr(&sp->v, "intensity"); if(sp->v.mtl != nil && sp->v.mtl->map_Kd != nil && sp->v.uv.w != 0) - c = texture(sp->v.mtl->map_Kd, sp->v.uv, tsampler); + tc = texture(sp->v.mtl->map_Kd, sp->v.uv, tsampler); else if(sp->su->entity->mdl->tex != nil && sp->v.uv.w != 0) - c = texture(sp->su->entity->mdl->tex, sp->v.uv, tsampler); + tc = texture(sp->su->entity->mdl->tex, sp->v.uv, tsampler); else - c = Pt3(1,1,1,1); + tc = Pt3(1,1,1,1); + + c.a = fclamp(sp->v.c.a*tc.a, 0, 1); + c.b = fclamp(sp->v.c.b*tc.b, 0, 1); + c.g = fclamp(sp->v.c.g*tc.g, 0, 1); + c.r = fclamp(sp->v.c.r*tc.r, 0, 1); - c = mulpt3(c, va->n); return c; } @@ -160,7 +200,7 @@ phongvshader(VSparams *sp) addvattr(sp->v, "specular", VAPoint, &s); addvattr(sp->v, "shininess", VANumber, &ss); } - return world2clip(maincam, model2world(sp->su->entity, sp->v->p)); + return world2clip(maincam, pos); } Color @@ -226,6 +266,25 @@ phongshader(FSparams *sp) return c; } +Point3 +identvshader(VSparams *sp) +{ + Point3 pos, lightdir; + double intens; + + pos = model2world(sp->su->entity, sp->v->p); + lightdir = normvec3(subpt3(light.p, pos)); + intens = fmax(0, dotvec3(sp->v->n, lightdir)); + addvattr(sp->v, "intensity", VANumber, &intens); + if(sp->v->mtl != nil){ + sp->v->c.r = sp->v->mtl->Kd.r; + sp->v->c.g = sp->v->mtl->Kd.g; + sp->v->c.b = sp->v->mtl->Kd.b; + sp->v->c.a = 1; + } + return world2clip(maincam, pos); +} + Color toonshader(FSparams *sp) { @@ -240,6 +299,32 @@ toonshader(FSparams *sp) } Color +identshader(FSparams *sp) +{ + Color tc, c; + + if(sp->v.mtl != nil && sp->v.mtl->map_Kd != nil && sp->v.uv.w != 0) + tc = texture(sp->v.mtl->map_Kd, sp->v.uv, tsampler); + else if(sp->su->entity->mdl->tex != nil && sp->v.uv.w != 0) + tc = texture(sp->su->entity->mdl->tex, sp->v.uv, tsampler); + else + tc = Pt3(1,1,1,1); + + c.a = fclamp(sp->v.c.a*tc.a, 0, 1); + c.b = fclamp(sp->v.c.b*tc.b, 0, 1); + c.g = fclamp(sp->v.c.g*tc.g, 0, 1); + c.r = fclamp(sp->v.c.r*tc.r, 0, 1); + + return c; +} + +Point3 +ivshader(VSparams *sp) +{ + return world2clip(maincam, model2world(sp->su->entity, sp->v->p)); +} + +Color triangleshader(FSparams *sp) { Triangle2 t; @@ -327,35 +412,15 @@ boxshader(FSparams *sp) return Pt3(uv.x, uv.y, smoothstep(0,1,uv.x+uv.y), 1); } -Point3 -ivshader(VSparams *sp) -{ - return world2clip(maincam, model2world(sp->su->entity, sp->v->p)); -} - -Color -identshader(FSparams *sp) -{ - Color c; - - if(sp->v.mtl != nil && sp->v.mtl->map_Kd != nil && sp->v.uv.w != 0) - c = texture(sp->v.mtl->map_Kd, sp->v.uv, tsampler); - else if(sp->su->entity->mdl->tex != nil && sp->v.uv.w != 0) - c = texture(sp->su->entity->mdl->tex, sp->v.uv, tsampler); - else - c = Pt3(1,1,1,1); - return c; -} - Shader shadertab[] = { { "triangle", ivshader, triangleshader }, { "circle", ivshader, circleshader }, { "box", ivshader, boxshader }, { "sf", ivshader, sfshader }, + { "toon", identvshader, toonshader }, + { "ident", identvshader, identshader }, + { "gouraud", gouraudvshader, gouraudshader }, { "phong", phongvshader, phongshader }, - { "gouraud", vertshader, gouraudshader }, - { "toon", vertshader, toonshader }, - { "ident", vertshader, identshader }, }; Shader * getshader(char *name) |