feat(shader-ast-js): add div-by-zero guards

packages/shader-ast-js/src/env/ivec2.ts

@@ -26,7 +26,7 @@ export const IVEC2: JSBuiltinsIntVec = {
     addnv: (a, b) => addNI2([], b, a),
     div: (a, b) => divI2([], a, b),
     divvn: (a, b) => divNI2([], a, b),
-    divnv: (a, b) => mulNI2([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulNI2([], b, 1 / a) : [0, 0]),
     modi: (a, b) => mod2([], a, b),
     modivn: (a, b) => modN2([], a, b),
     modinv: (a, b) => mod2([], [a, a], b),

packages/shader-ast-js/src/env/ivec3.ts

@@ -26,7 +26,7 @@ export const IVEC3: JSBuiltinsIntVec = {
     addnv: (a, b) => addNI3([], b, a),
     div: (a, b) => divI3([], a, b),
     divvn: (a, b) => divNI3([], a, b),
-    divnv: (a, b) => mulNI3([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulNI3([], b, 1 / a) : [0, 0, 0]),
     modi: (a, b) => mod3([], a, b),
     modivn: (a, b) => modN3([], a, b),
     modinv: (a, b) => mod3([], [a, a, a], b),

packages/shader-ast-js/src/env/ivec4.ts

@@ -26,7 +26,10 @@ export const IVEC4: JSBuiltinsIntVec = {
     addnv: (a, b) => addNI4([], b, a),
     div: (a, b) => divI4([], a, b),
     divvn: (a, b) => divNI4([], a, b),
-    divnv: (a, b) => mulNI4([], b, 1 / a),
+    divnv: (a, b) => {
+        // TODO writing this as w/o return statement causes rollup to hang?!
+        return a !== 0 ? mulNI4([], b, 1 / a) : [0, 0, 0, 0];
+    },
     modi: (a, b) => mod4([], a, b),
     modivn: (a, b) => modN4([], a, b),
     modinv: (a, b) => mod4([], [a, a, a, a], b),

packages/shader-ast-js/src/env/mat2.ts

@@ -20,7 +20,7 @@ export const MAT2: JSBuiltinsMat = {
     addvn: (a, b) => addN22([], a, b),
     dec: (a) => subN22([], a, 1),
     div: (a, b) => div22([], a, b),
-    divnv: (a, b) => mulN22([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulN22([], b, 1 / a) : [0, 0, 0, 0]),
     divvn: (a, b) => divN22([], a, b),
     inc: (a) => addN22([], a, 1),
     mul: (a, b) => mul22([], a, b),

packages/shader-ast-js/src/env/mat3.ts

@@ -11,7 +11,7 @@ import {
     sub33,
     subN33
 } from "@thi.ng/matrices";
-import { neg, vecOf } from "@thi.ng/vectors";
+import { neg, vecOf, zeroes } from "@thi.ng/vectors";
 import { JSBuiltinsMat } from "../api";
 
 export const MAT3: JSBuiltinsMat = {
@@ -20,7 +20,7 @@ export const MAT3: JSBuiltinsMat = {
     addvn: (a, b) => addN33([], a, b),
     dec: (a) => subN33([], a, 1),
     div: (a, b) => div33([], a, b),
-    divnv: (a, b) => mulN33([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulN33([], b, 1 / a) : zeroes(9)),
     divvn: (a, b) => divN33([], a, b),
     inc: (a) => addN33([], a, 1),
     mul: (a, b) => mul33([], a, b),

packages/shader-ast-js/src/env/mat4.ts

@@ -11,7 +11,7 @@ import {
     sub44,
     subN44
 } from "@thi.ng/matrices";
-import { neg, vecOf } from "@thi.ng/vectors";
+import { neg, vecOf, zeroes } from "@thi.ng/vectors";
 import { JSBuiltinsMat } from "../api";
 
 export const MAT4: JSBuiltinsMat = {
@@ -20,7 +20,7 @@ export const MAT4: JSBuiltinsMat = {
     addvn: (a, b) => addN44([], a, b),
     dec: (a) => subN44([], a, 1),
     div: (a, b) => div44([], a, b),
-    divnv: (a, b) => mulN44([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulN44([], b, 1 / a) : zeroes(16)),
     divvn: (a, b) => divN44([], a, b),
     inc: (a) => addN44([], a, 1),
     mul: (a, b) => mul44([], a, b),

packages/shader-ast-js/src/env/uvec2.ts

@@ -26,7 +26,7 @@ export const UVEC2: JSBuiltinsIntVec = {
     addnv: (a, b) => addNU2([], b, a),
     div: (a, b) => divU2([], a, b),
     divvn: (a, b) => divNU2([], a, b),
-    divnv: (a, b) => mulNU2([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulNU2([], b, 1 / a) : [0, 0]),
     modi: (a, b) => mod2([], a, b),
     modivn: (a, b) => modN2([], a, b),
     modinv: (a, b) => mod2([], [a, a], b),

packages/shader-ast-js/src/env/uvec3.ts

@@ -26,7 +26,7 @@ export const UVEC3: JSBuiltinsIntVec = {
     addnv: (a, b) => addNU3([], b, a),
     div: (a, b) => divU3([], a, b),
     divvn: (a, b) => divNU3([], a, b),
-    divnv: (a, b) => mulNU3([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulNU3([], b, 1 / a) : [0, 0, 0]),
     modi: (a, b) => mod3([], a, b),
     modivn: (a, b) => modN3([], a, b),
     modinv: (a, b) => mod3([], [a, a, a], b),

packages/shader-ast-js/src/env/uvec4.ts

@@ -26,7 +26,10 @@ export const UVEC4: JSBuiltinsIntVec = {
     addnv: (a, b) => addNU4([], b, a),
     div: (a, b) => divU4([], a, b),
     divvn: (a, b) => divNU4([], a, b),
-    divnv: (a, b) => mulNU4([], b, 1 / a),
+    divnv: (a, b) => {
+        // TODO writing this as w/o return statement causes rollup to hang?!
+        return a !== 0 ? mulNU4([], b, 1 / a) : [0, 0, 0, 0];
+    },
     modi: (a, b) => mod4([], a, b),
     modivn: (a, b) => modN4([], a, b),
     modinv: (a, b) => mod4([], [a, a, a, a], b),

packages/shader-ast-js/src/env/vec2.ts

@@ -67,7 +67,7 @@ export const VEC2: JSBuiltinsVec = {
     dFdy: () => ZERO2,
     distance: dist,
     div: (a, b) => div2([], a, b),
-    divnv: (a, b) => mulN2([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulN2([], b, 1 / a) : [0, 0]),
     divvn: (a, b) => divN2([], a, b),
     dot: (a, b) => dot2(a, b),
     exp: (a) => exp2([], a),

packages/shader-ast-js/src/env/vec3.ts

@@ -69,7 +69,7 @@ export const VEC3: JSBuiltinsVec3 = {
     dFdy: () => ZERO3,
     distance: dist,
     div: (a, b) => div3([], a, b),
-    divnv: (a, b) => mulN3([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulN3([], b, 1 / a) : [0, 0, 0]),
     divvn: (a, b) => divN3([], a, b),
     dot: (a, b) => dot3(a, b),
     exp: (a) => exp3([], a),

packages/shader-ast-js/src/env/vec4.ts

@@ -67,7 +67,7 @@ export const VEC4: JSBuiltinsVec = {
     dFdy: () => ZERO4,
     distance: dist,
     div: (a, b) => div4([], a, b),
-    divnv: (a, b) => mulN4([], b, 1 / a),
+    divnv: (a, b) => (a !== 0 ? mulN4([], b, 1 / a) : [0, 0, 0, 0]),
     divvn: (a, b) => divN4([], a, b),
     dot: (a, b) => dot4(a, b),
     exp: (a) => exp4([], a),