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authorColin Okay <colin@cicadas.surf>2022-06-22 07:31:58 -0500
committerColin Okay <colin@cicadas.surf>2022-06-22 07:31:58 -0500
commit7a9f89e46e21f2c18d6e61eee16c6d37bdd27800 (patch)
tree667c42d4b82b24b4e860286a1b54975bc5a6669d /wheelwork.lisp
parenta3d98d979bca7f55c3fdbeda62f482374f140c73 (diff)
[fix] bitmap shader program to handle alpha channel appropriately
Diffstat (limited to 'wheelwork.lisp')
-rw-r--r--wheelwork.lisp5
1 files changed, 4 insertions, 1 deletions
diff --git a/wheelwork.lisp b/wheelwork.lisp
index 42dd830..a66d6a6 100644
--- a/wheelwork.lisp
+++ b/wheelwork.lisp
@@ -301,7 +301,10 @@ order). Makes sure to remove the unit from its current container if necessary."
'(:fragment
((tc :vec2))
((tex :sampler-2d))
- ((vari:texture tex tc)))))
+ ((let ((frag (vari:texture tex tc)))
+ (if (< (aref frag 3) 0.01)
+ (vari:discard)
+ frag))))))
(gl:program-uniformi
shader
(gl:get-uniform-location shader "TEX")