From d615d6795ee81e59795081b7fb2524978b6aa9cb Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Fri, 30 Oct 2009 01:13:34 -0400
Subject: (Sort of) parse boxes.

---
 dimension/realize.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 48 insertions(+), 2 deletions(-)

(limited to 'dimension/realize.c')

diff --git a/dimension/realize.c b/dimension/realize.c
index 7f5e385..67536e6 100644
--- a/dimension/realize.c
+++ b/dimension/realize.c
@@ -22,7 +22,53 @@
 #include "utility.h"
 
 dmnsn_scene *
-dmnsn_realize(dmnsn_array *astree)
+dmnsn_realize(const dmnsn_array *astree)
 {
-  return dmnsn_new_scene();
+  dmnsn_scene *scene = dmnsn_new_scene();
+  if (!scene) {
+    return NULL;
+  }
+
+  /* Background color */
+  dmnsn_sRGB background_sRGB = { .R = 0.0, .G = 0.05, .B = 0.1 };
+  scene->background = dmnsn_color_from_sRGB(background_sRGB);
+
+  /* Allocate a canvas */
+  scene->canvas = dmnsn_new_canvas(768, 480);
+  if (!scene->canvas) {
+    dmnsn_delete_realized_scene(scene);
+    return NULL;
+  }
+
+  /* Set up the transformation matrix for the perspective camera */
+  dmnsn_matrix trans = dmnsn_scale_matrix(
+    dmnsn_vector_construct(
+      ((double)scene->canvas->x)/scene->canvas->y, 1.0, 1.0
+    )
+  );
+  trans = dmnsn_matrix_mul(
+    dmnsn_translation_matrix(dmnsn_vector_construct(0.0, 0.0, -4.0)),
+    trans
+  );
+  trans = dmnsn_matrix_mul(
+    dmnsn_rotation_matrix(dmnsn_vector_construct(0.0, 1.0, 0.0)),
+    trans
+  );
+
+  /* Create a perspective camera */
+  scene->camera = dmnsn_new_perspective_camera();
+  if (!scene->camera) {
+    dmnsn_delete_realized_scene(scene);
+    return NULL;
+  }
+
+  return scene;
+}
+
+void
+dmnsn_delete_realized_scene(dmnsn_scene *scene)
+{
+  dmnsn_delete_camera(scene->camera);
+  dmnsn_delete_canvas(scene->canvas);
+  dmnsn_delete_scene(scene);
 }
-- 
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