From 57f984c92a9787517e18d7b26c79102c53e2ca59 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Sat, 30 Apr 2011 11:42:23 -0400
Subject: [PATCH] switch to perspective projection

---
 template/test.cc | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/template/test.cc b/template/test.cc
index 08d934f..73db8bb 100644
--- a/template/test.cc
+++ b/template/test.cc
@@ -21,7 +21,7 @@ const GLfloat data[][2][3] = {
     {{-0.6, 0.6, 0.0}, {0, 0, 1}},
     {{0.2, -0.6, 0.0}, {1, 0, 0}},
     {{1.0, -0.6, 0.0}, {0, 1, 0}},
-    {{0.6, 0.6, -500.0}, {0, 0, 1}}
+    {{0.6, 0.6, -10.0}, {0, 0, 1}}
 };
 const GLushort indices[] = {
     0, 1, 2, 3, 4, 5
@@ -132,10 +132,13 @@ bool init(int width, int height)
     glViewport(0, 0, WIDTH, HEIGHT);
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    glOrtho((float)-width/(float)height, (float)width/(float)height,
-            -1, 1, 1000, -1000);
+    float near = 0.1;
+    float scale = near * 0.577 * 2;
+    float aspect = (float)width / (float)height;
+    glFrustum(-aspect * scale, aspect * scale, -scale, scale, near, 1000.0);
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
+    glTranslatef(0, 0, -1);
 
     vs = makeShader(GL_VERTEX_SHADER, "v_shader.glsl");
     fs = makeShader(GL_FRAGMENT_SHADER, "f_shader.glsl");