shithub: tinyrend

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remove unnecessary matrix xforms from the vertex shaders.

--- a/main.c

+++ b/main.c

@@ -420,19 +420,14 @@

 		0, 1, 0, 0,

 		sin(θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)), 0, cos(θ+fmod(ω*sp->su->uni_time/1e9, 2*PI)), 0,

 		0, 0, 0, 1,

-	}, M, T, V;

+	}, M, V;

 	identity3(M);

-	identity3(T);

 	identity3(V);

 	mulm3(M, rota);

 	mulm3(M, yrot);

-	mulm3(V, M);

-	mulm3(T, proj);

-	mulm3(T, V);

-	identity3(V);

 	mulm3(V, view);

-	mulm3(V, T);

+	mulm3(V, M);

 	*sp->n = xform3(*sp->n, M);

 	sp->su->var_intensity[sp->idx] = fmax(0, dotvec3(*sp->n, light));

@@ -681,16 +676,13 @@

 Point3

 ivshader(VSparams *sp)

 {

-	Matrix3 M, D, V;

+	Matrix3 M, V;

 	identity3(M);

-	identity3(D);

 	identity3(V);

 	mulm3(M, rota);

-	mulm3(D, proj);

 	mulm3(V, view);

-	mulm3(D, M);

-	mulm3(V, D);

+	mulm3(V, M);

 	return xform3(*sp->p, V);

 }

@@ -1058,6 +1050,7 @@

 	projection(-1.0/vec3len(subpt3(camera, center)));

 	identity3(rota);

 	lookat(camera, center, up);

+	mulm3(view, proj);

 	light = normvec3(subpt3(light, center));

 	drawc = chancreate(sizeof(void*), 1);