tweak spotlight pos

demos/09-shadows.c

@@ -90,6 +90,7 @@ int main(int argc, char** argv) {
             sky = skybox(flag("--mie") ? 0 : SKY_DIRS[SKY_DIR], 0);
             sm = shadowmap(512, 4096);
             // sm.blur_pcf = 1;
+            // sm.blur_scale 
             mdl = model(OBJ_MDLS[OBJ_MDL], 0);
             shader_bind(mdl.program);
             cubemap_sh_shader(&sky.cubemap);
@@ -139,11 +140,15 @@ int main(int argc, char** argv) {
         if (input_down(KEY_SPACE)) camera_spot = !camera_spot;
         if (mode == SPOT && camera_spot) {
             lights[0].pos = cam.position;
+            lights[0].pos = add3(lights[0].pos, scale3(cam.lookdir, 1.5f));
+            vec3 rhs = cross3(cam.lookdir, vec3(0,1,0));
+            lights[0].pos = add3(lights[0].pos, scale3(rhs, 0.5));
             lights[0].dir = cam.lookdir;
         }
 
         if (mode == DIR) {
             lights[0].pos = cam.position;
+
             lights[0].dir = vec3(1,-1,-1);
         }
 
@@ -159,6 +164,9 @@ int main(int argc, char** argv) {
             lights[1].pos.z += cosf(window_time()*4)*6.0;
 
             lights[2].pos = cam.position;
+            lights[2].pos = add3(lights[2].pos, scale3(cam.lookdir, 1.5f));
+            vec3 rhs = cross3(cam.lookdir, vec3(0,1,0));
+            lights[2].pos = add3(lights[2].pos, scale3(rhs, 0.5));
             lights[2].dir = cam.lookdir;
 
             lights[3].dir = vec3(1,-1,-1);