Comments in hello_obj2.lc

1 files changed, 11 insertions, 4 deletions

diff --git a/hello_obj2.lc b/hello_obj2.lc
index a6c40ff..ebee807 100644
--- a/hello_obj2.lc
+++ b/hello_obj2.lc
@@ -1,8 +1,15 @@
+deg30 = 0.5235987755982988 -- pi/6
+
 coordmap (time::Float) (p::Vec 4 Float)
-    = perspective 0.1 100 30 1
-                      *. lookat (V3 0 0 5) (V3 0 0 0) (V3 0 1 0)
-                      *. rotMatrixX time
-                      *. rotMatrixZ time
+    = perspective 0.1 -- near plane
+                  100 -- far plane
+                deg30 -- y fov radians
+                    1 -- aspect ratio w/h
+                      *. lookat (V3 0 0 10) -- camera position
+                                (V3 0 0 0)  -- target position
+                                (V3 0 1 0)  -- upward direction
+                      *. rotMatrixX time -- time = radians
+                      *. rotMatrixZ time -- time = radians
                       *. p
 
 blendplane = -- NoBlending -- BlendLogicOp Xor