Rotate the camera eye around

examples/test/shaders/test.frag

@@ -69,7 +69,10 @@ void main() {
 	vec2 uv = gl_FragCoord.xy * 2.0 / u_Resolution.xy - 1.0;
 	uv.x *= u_Resolution.x/u_Resolution.y;
 
-	vec3 eye = vec3(0., 0., -5.);
+    float an = 0.3 * u_Time;
+    float d = 2. + sin(an) * 1.6;
+	vec3 eye = vec3(3. * sin(an), 2., 3. * cos(an)) * d;
+	vec3 target = vec3(0., 0., 0.);
 	mat3 lookAt = look_mat(eye, target, 0);
 	vec3 dir = normalize(lookAt * ray_dir(FOV, uv));