fixed bug where +y is along down

sukhsung · Feb 9, 2024 · 64db42a · 64db42a
1 parent 06bdc09
commit 64db42a
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Showing 4 changed files with 8 additions and 8 deletions.
diff --git a/.DS_Store b/.DS_Store
diff --git a/ronch_calc.js b/ronch_calc.js
@@ -153,10 +153,10 @@ function drawGrayscaleBitmap2( ctx, input, numPx ) {
     for (let i = 0; i < numPx; i++ ){
         for (let j = 0; j <numPx; j++ ){
             red = i * (numPx * 4) + j * 4
-
-            data[red] = input[i][j]
-            data[red+1] = input[i][j]
-            data[red+2] = input[i][j]
+            y_index = (numPx-1)-i // To flip y
+            data[red]   = input[y_index][j]
+            data[red+1] = input[y_index][j]
+            data[red+2] = input[y_index][j]
             data[red+3] = 255
         }
 

diff --git a/vasco/.DS_Store b/vasco/.DS_Store
diff --git a/vasco/ronch_calc.js b/vasco/ronch_calc.js
@@ -107,10 +107,10 @@ function drawGrayscaleBitmap2( ctx, input, numPx ) {
     for (let i = 0; i < numPx; i++ ){
         for (let j = 0; j <numPx; j++ ){
             red = i * (numPx * 4) + j * 4;
-
-            data[red] = input[i][j];
-            data[red + 1] = input[i][j];
-            data[red + 2] = input[i][j];
+            y_index = (numPx-1)-i // To flip y
+            data[red]   = input[y_index][j]
+            data[red+1] = input[y_index][j]
+            data[red+2] = input[y_index][j]
             data[red + 3] = 255;
         }
     }