From daeb052003bdfbd85a11953ba6be243138951ee4 Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Sat, 21 Sep 2013 17:02:26 -0700
Subject: [PATCH] Don't acknowledge intersections closer than t=1e-2.

This avoids intersections with the shape itself.
---
 src/scene.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/scene.cc b/src/scene.cc
index d6f471f..f426637 100644
--- a/src/scene.cc
+++ b/src/scene.cc
@@ -200,6 +200,9 @@ Scene::trace_ray(const Ray &ray,
         nints = s->does_intersect(ray, &t);
         if (nints > 0) {
             for (int i = 0; i < nints; i++) {
+                if (t[i] < 1e-2) {
+                    break;
+                }
                 if (t[i] < nearest_t) {
                     intersected_shape = s;
                     nearest_t = t[i];