shithub: tinyrend

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add keys to move the camera around.

--- a/main.c

+++ b/main.c

@@ -165,6 +165,7 @@

 	z = normvec3(subpt3(eye, o));

 	x = normvec3(crossvec3(up, z));

 	y = normvec3(crossvec3(z, x));

+	identity3(rota);

 	rota[0][0] = x.x; rota[0][1] = x.y; rota[0][2] = x.z; rota[0][3] = -o.x;

 	rota[1][0] = y.x; rota[1][1] = y.y; rota[1][2] = y.z; rota[1][3] = -o.y;

 	rota[2][0] = z.x; rota[2][1] = z.y; rota[2][2] = z.z; rota[2][3] = -o.z;

@@ -714,6 +715,30 @@

 	case Kdel:

 	case 'q':

 		threadexitsall(nil);

+	case 'w':

+	case 's':

+		camera.z += r == 'w'? -1: 1;

+		viewport(screenfb->r);

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

+		lookat(camera, center, up);

+		mulm3(view, proj);

+		break;

+	case 'a':

+	case 'd':

+		camera.x += r == 'a'? -1: 1;

+		viewport(screenfb->r);

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

+		lookat(camera, center, up);

+		mulm3(view, proj);

+		break;

+	case Kdown:

+	case Kup:

+		camera.y += r == Kdown? -1: 1;

+		viewport(screenfb->r);

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

+		lookat(camera, center, up);

+		mulm3(view, proj);

+		break;

 	}

 }

@@ -720,7 +745,7 @@

 void

 usage(void)

 {

-	fprint(2, "usage: %s [-n nprocs] [-m objfile] [-t texfile] [-a yrotangle] [-z camzpos] [-s shader] [-w width] [-h height] [-S scale]\n", argv0);

+	fprint(2, "usage: %s [-n nprocs] [-m objfile] [-t texfile] [-a yrotangle] [-s shader] [-w width] [-h height] [-S scale]\n", argv0);

 	exits("usage");

 }

@@ -759,9 +784,6 @@

 	case 'v':

 		ω = strtod(EARGF(usage()), nil)*DEG;

 		break;

-	case 'z':

-		camera.z = strtod(EARGF(usage()), nil);

-		break;

 	case 's':

 		sname = EARGF(usage());

 		break;

@@ -823,7 +845,6 @@

 	viewport(screenfb->r);

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

-	identity3(rota);

 	lookat(camera, center, up);

 	mulm3(view, proj);

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