I MADE A GRID USING WGSL

.gitignore

@@ -1 +1,2 @@
 /target
+/.vscode

Cargo.lock

@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
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@@ -110,9 +110,9 @@ dependencies = [
 
 [[package]]
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 [[package]]
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@@ -165,9 +165,9 @@ dependencies = [
 
 [[package]]
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@@ -226,18 +226,18 @@ checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
 
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 dependencies = [
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@@ -253,9 +253,9 @@ dependencies = [
 
 [[package]]
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@@ -268,9 +268,9 @@ dependencies = [
 
 [[package]]
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@@ -296,9 +296,9 @@ dependencies = [
 
 [[package]]
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@@ -312,9 +312,9 @@ dependencies = [
 
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@@ -327,9 +327,9 @@ dependencies = [
 
 [[package]]
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@@ -345,9 +345,9 @@ dependencies = [
 
 [[package]]
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@@ -356,9 +356,9 @@ dependencies = [
 
 [[package]]
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@@ -369,9 +369,9 @@ dependencies = [
 
 [[package]]
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@@ -388,9 +388,9 @@ dependencies = [
 
 [[package]]
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@@ -400,9 +400,9 @@ dependencies = [
 
 [[package]]
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@@ -413,9 +413,9 @@ dependencies = [
 
 [[package]]
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@@ -423,9 +423,9 @@ dependencies = [
 
 [[package]]
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@@ -436,9 +436,9 @@ dependencies = [
 
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@@ -465,9 +465,9 @@ dependencies = [
 
 [[package]]
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 dependencies = [
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@@ -478,9 +478,9 @@ dependencies = [
 
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@@ -490,9 +490,9 @@ dependencies = [
 
 [[package]]
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 dependencies = [
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@@ -528,9 +528,9 @@ dependencies = [
 
 [[package]]
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 dependencies = [
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@@ -543,9 +543,9 @@ dependencies = [
 
 [[package]]
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@@ -554,27 +554,27 @@ dependencies = [
 
 [[package]]
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 [[package]]
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 dependencies = [
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@@ -604,15 +604,15 @@ dependencies = [
 
 [[package]]
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@@ -629,9 +629,9 @@ dependencies = [
 
 [[package]]
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@@ -642,9 +642,9 @@ dependencies = [
 
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@@ -685,9 +685,9 @@ dependencies = [
 
 [[package]]
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@@ -719,9 +719,9 @@ dependencies = [
 
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@@ -745,9 +745,9 @@ dependencies = [
 
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@@ -760,9 +760,9 @@ dependencies = [
 
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 dependencies = [
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@@ -783,9 +783,9 @@ dependencies = [
 
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@@ -796,9 +796,9 @@ dependencies = [
 
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@@ -809,9 +809,9 @@ dependencies = [
 
 [[package]]
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 dependencies = [
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@@ -837,13 +837,13 @@ dependencies = [
 
 [[package]]
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 dependencies = [
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- "hashbrown 0.12.3",
+ "hashbrown",
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@@ -851,9 +851,9 @@ dependencies = [
 
 [[package]]
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@@ -866,9 +866,9 @@ dependencies = [
 
 [[package]]
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 dependencies = [
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@@ -932,24 +932,24 @@ checksum = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
 
 [[package]]
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+version = "3.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37ccbd214614c6783386c1af30caf03192f17891059cecc394b4fb119e363de3"
+checksum = "c1ad822118d20d2c234f427000d5acc36eabe1e29a348c89b63dd60b13f28e5d"
 
 [[package]]
 name = "bytemuck"
-version = "1.11.0"
+version = "1.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5377c8865e74a160d21f29c2d40669f53286db6eab59b88540cbb12ffc8b835"
+checksum = "2f5715e491b5a1598fc2bef5a606847b5dc1d48ea625bd3c02c00de8285591da"
 dependencies = [
  "bytemuck_derive",
 ]
 
 [[package]]
 name = "bytemuck_derive"
-version = "1.1.1"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cfd2f4180c5721da6335cc9e9061cce522b87a35e51cc57636d28d22a9863c80"
+checksum = "1b9e1f5fa78f69496407a27ae9ed989e3c3b072310286f5ef385525e4cbc24a9"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -964,9 +964,9 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "bytes"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0b3de4a0c5e67e16066a0715723abd91edc2f9001d09c46e1dca929351e130e"
+checksum = "ec8a7b6a70fde80372154c65702f00a0f56f3e1c36abbc6c440484be248856db"
 
 [[package]]
 name = "cache-padded"
@@ -1106,9 +1106,9 @@ checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
 
 [[package]]
 name = "combine"
-version = "4.6.4"
+version = "4.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a604e93b79d1808327a6fca85a6f2d69de66461e7620f5a4cbf5fb4d1d7c948"
+checksum = "35ed6e9d84f0b51a7f52daf1c7d71dd136fd7a3f41a8462b8cdb8c78d920fad4"
 dependencies = [
  "bytes",
  "memchr",
@@ -1116,9 +1116,9 @@ dependencies = [
 
 [[package]]
 name = "concurrent-queue"
-version = "1.2.2"
+version = "1.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30ed07550be01594c6026cff2a1d7fe9c8f683caa798e12b68694ac9e88286a3"
+checksum = "af4780a44ab5696ea9e28294517f1fffb421a83a25af521333c838635509db9c"
 dependencies = [
  "cache-padded",
 ]
@@ -1463,9 +1463,9 @@ dependencies = [
 
 [[package]]
 name = "erased-serde"
-version = "0.3.21"
+version = "0.3.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81d013529d5574a60caeda29e179e695125448e5de52e3874f7b4c1d7360e18e"
+checksum = "003000e712ad0f95857bd4d2ef8d1890069e06554101697d12050668b2f6f020"
 dependencies = [
  "serde",
 ]
@@ -1491,9 +1491,9 @@ dependencies = [
 
 [[package]]
 name = "event-listener"
-version = "2.5.2"
+version = "2.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77f3309417938f28bf8228fcff79a4a37103981e3e186d2ccd19c74b38f4eb71"
+checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
 
 [[package]]
 name = "fastrand"
@@ -1579,15 +1579,15 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.21"
+version = "0.3.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c09fd04b7e4073ac7156a9539b57a484a8ea920f79c7c675d05d289ab6110d3"
+checksum = "d2acedae88d38235936c3922476b10fced7b2b68136f5e3c03c2d5be348a1115"
 
 [[package]]
 name = "futures-io"
-version = "0.3.21"
+version = "0.3.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc4045962a5a5e935ee2fdedaa4e08284547402885ab326734432bed5d12966b"
+checksum = "93a66fc6d035a26a3ae255a6d2bca35eda63ae4c5512bef54449113f7a1228e5"
 
 [[package]]
 name = "futures-lite"
@@ -1715,9 +1715,9 @@ dependencies = [
 
 [[package]]
 name = "glam"
-version = "0.21.2"
+version = "0.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "781aa11be58ef14b0cd7326618afcbd9cdb5ba686bdab7193d87cdc322cd7033"
+checksum = "518faa5064866338b013ff9b2350dc318e14cc4fcd6cb8206d7e7c9886c98815"
 dependencies = [
  "bytemuck",
  "serde",
@@ -1829,13 +1829,13 @@ dependencies = [
 
 [[package]]
 name = "gpu-descriptor"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a538f217be4d405ff4719a283ca68323cc2384003eca5baaa87501e821c81dda"
+checksum = "0b0c02e1ba0bdb14e965058ca34e09c020f8e507a760df1121728e0aef68d57a"
 dependencies = [
  "bitflags",
  "gpu-descriptor-types",
- "hashbrown 0.11.2",
+ "hashbrown",
 ]
 
 [[package]]
@@ -1895,15 +1895,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "hashbrown"
-version = "0.11.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
-dependencies = [
- "ahash",
-]
-
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -2006,7 +1997,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "10a35a97730320ffe8e2d410b5d3b69279b98d2c14bdb8b70ea89ecf7888d41e"
 dependencies = [
  "autocfg",
- "hashbrown 0.12.3",
+ "hashbrown",
 ]
 
 [[package]]
@@ -2065,9 +2056,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "112c678d4050afce233f4f2852bb2eb519230b3cf12f33585275537d7e41578d"
+checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
 
 [[package]]
 name = "jni"
@@ -2169,9 +2160,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.126"
+version = "0.2.132"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+checksum = "8371e4e5341c3a96db127eb2465ac681ced4c433e01dd0e938adbef26ba93ba5"
 
 [[package]]
 name = "libloading"
@@ -2701,15 +2692,15 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.13.0"
+version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1"
+checksum = "074864da206b4973b84eb91683020dbefd6a8c3f0f38e054d93954e891935e4e"
 
 [[package]]
 name = "owned_ttf_parser"
-version = "0.15.0"
+version = "0.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fb1e509cfe7a12db2a90bfa057dfcdbc55a347f5da677c506b53dd099cfec9d"
+checksum = "07ef1a404ae479dd6906f4fa2c88b3c94028f1284beb42a47c183a7c27ee9a3e"
 dependencies = [
  "ttf-parser",
 ]
@@ -2849,19 +2840,20 @@ dependencies = [
 
 [[package]]
 name = "proc-macro-crate"
-version = "1.1.3"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e17d47ce914bf4de440332250b0edd23ce48c005f59fab39d3335866b114f11a"
+checksum = "eda0fc3b0fb7c975631757e14d9049da17374063edb6ebbcbc54d880d4fe94e9"
 dependencies = [
+ "once_cell",
  "thiserror",
  "toml",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.41"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdcc2916cde080c1876ff40292a396541241fe0072ef928cd76582e9ea5d60d2"
+checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
 dependencies = [
  "unicode-ident",
 ]
@@ -2874,9 +2866,9 @@ checksum = "2f61dcf0b917cd75d4521d7343d1ffff3d1583054133c9b5cbea3375c703c40d"
 
 [[package]]
 name = "quote"
-version = "1.0.20"
+version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3bcdf212e9776fbcb2d23ab029360416bb1706b1aea2d1a5ba002727cbcab804"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
 dependencies = [
  "proc-macro2",
 ]
@@ -2919,9 +2911,9 @@ checksum = "a0d463f2884048e7153449a55166f91028d5b0ea53c79377099ce4e8cf0cf9bb"
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.15"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "534cfe58d6a18cc17120fbf4635d53d14691c1fe4d951064df9bd326178d7d5a"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
 dependencies = [
  "bitflags",
 ]
@@ -3022,9 +3014,9 @@ dependencies = [
 
 [[package]]
 name = "ryu"
-version = "1.0.10"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3f6f92acf49d1b98f7a81226834412ada05458b7364277387724a237f062695"
+checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
 
 [[package]]
 name = "same-file"
@@ -3049,18 +3041,18 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "serde"
-version = "1.0.140"
+version = "1.0.144"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc855a42c7967b7c369eb5860f7164ef1f6f81c20c7cc1141f2a604e18723b03"
+checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.140"
+version = "1.0.144"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f2122636b9fe3b81f1cb25099fcf2d3f542cdb1d45940d56c713158884a05da"
+checksum = "94ed3a816fb1d101812f83e789f888322c34e291f894f19590dc310963e87a00"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3069,9 +3061,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.82"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82c2c1fdcd807d1098552c5b9a36e425e42e9fbd7c6a37a8425f390f781f7fa7"
+checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
 dependencies = [
  "itoa",
  "ryu",
@@ -3182,9 +3174,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.98"
+version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3228,18 +3220,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.31"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd829fe32373d27f76265620b5309d0340cb8550f523c1dda251d6298069069a"
+checksum = "f5f6586b7f764adc0231f4c79be7b920e766bb2f3e51b3661cdb263828f19994"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.31"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0396bc89e626244658bef819e22d0cc459e795a5ebe878e6ec336d1674a8d79a"
+checksum = "12bafc5b54507e0149cdf1b145a5d80ab80a90bcd9275df43d4fff68460f6c21"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3292,9 +3284,9 @@ dependencies = [
 
 [[package]]
 name = "tracing"
-version = "0.1.35"
+version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a400e31aa60b9d44a52a8ee0343b5b18566b03a8321e0d321f695cf56e940160"
+checksum = "2fce9567bd60a67d08a16488756721ba392f24f29006402881e43b19aac64307"
 dependencies = [
  "cfg-if 1.0.0",
  "pin-project-lite",
@@ -3315,9 +3307,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-core"
-version = "0.1.28"
+version = "0.1.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b7358be39f2f274f322d2aaed611acc57f382e8eb1e5b48cb9ae30933495ce7"
+checksum = "5aeea4303076558a00714b823f9ad67d58a3bbda1df83d8827d21193156e22f7"
 dependencies = [
  "once_cell",
  "valuable",
@@ -3383,9 +3375,9 @@ checksum = "099b7128301d285f79ddd55b9a83d5e6b9e97c92e0ea0daebee7263e932de992"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15c61ba63f9235225a22310255a29b806b907c9b8c964bcbd0a2c70f3f2deea7"
+checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
 
 [[package]]
 name = "unicode-normalization"
@@ -3831,9 +3823,9 @@ dependencies = [
 
 [[package]]
 name = "x11-dl"
-version = "2.19.1"
+version = "2.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea26926b4ce81a6f5d9d0f3a0bc401e5a37c6ae14a1bfaa8ff6099ca80038c59"
+checksum = "0c83627bc137605acc00bb399c7b908ef460b621fc37c953db2b09f88c449ea6"
 dependencies = [
  "lazy_static",
  "libc",

README.md

@@ -10,7 +10,7 @@ Eventually, this will be a level editor... But until then, I guess it's just fun
 - [x] Highlight opened shapes in the tree(maybe allow only 1 opened shape? - I dont think egui allows me to do that)
 - [x] Drag camera around
 - [x] Zome in/out
-- [ ] Import images:
+- [x] Import images:
   - [x] Insert images
   - [x] Show images in tree view
   - [x] Show/Hide images
@@ -23,7 +23,8 @@ Eventually, this will be a level editor... But until then, I guess it's just fun
 - [x] Control shape Z value
 - [x] Snap to grid
 - [x] Change grid size
-- [ ] Show/Hide grid(also make a visible grid in the first place)
+- [x] Show/Hide grid(also make a visible grid in the first place)
+- [ ] Make grid fill the screen at all times
 - [ ] Save? (maybe just import and export directly?)
 - [ ] Export
 - [ ] Import

assets/shaders/grid.wgsl

@@ -0,0 +1,34 @@
+@group(1) @binding(0)
+var<uniform> grid_width: f32;
+@group(1) @binding(1)
+var<uniform> grid_size: vec2<f32>;
+@group(1) @binding(2)
+var<uniform> visible: u32;
+let grid_color: vec4<f32> = vec4<f32>(1.0, 1.0, 1.0, 0.3);
+let x_color: vec4<f32> = vec4<f32>(1.0, 0.0, 0.0, 1.0);
+let y_color :vec4<f32> = vec4<f32>(0.0, 1.0, 0.0, 1.0);
+
+@fragment
+fn fragment(
+    @builtin(position) position: vec4<f32>,
+    #import bevy_sprite::mesh2d_vertex_output
+) -> @location(0) vec4<f32> {
+    if abs(world_position.y) < grid_width && abs(world_position.x) < grid_width {
+        return grid_color;
+    }
+    else if abs(world_position.y) < grid_width {
+        return x_color;
+    }
+    else if abs(world_position.x) < grid_width {
+        return y_color;
+    }
+    else if visible == u32(0) {
+        return vec4<f32>(0.0, 0.0, 0.0, 0.0);
+    }
+    else if abs(world_position.x) % grid_size.x <= grid_width || abs(world_position.y) % grid_size.y <= grid_width {
+        return grid_color;
+    }
+    else {
+        return vec4<f32>(0.0, 0.0, 0.0, 0.0);
+    }
+}

src/infinite_grid.rs

@@ -0,0 +1,61 @@
+use bevy::prelude::*;
+use bevy::reflect::TypeUuid;
+use bevy::render::render_resource::AsBindGroup;
+use bevy::sprite::{MaterialMesh2dBundle, Material2d};
+
+use crate::MainCamera;
+
+#[derive(AsBindGroup, TypeUuid, Debug, Clone)]
+#[uuid = "b56a4075-b836-4866-a6f6-3e34ef3ae44f"]
+pub struct GridMaterial {
+    #[uniform(0)]
+    width: f32,
+    #[uniform(1)]
+    size: Vec2,
+    #[uniform(2)]
+    visible: u32,
+}
+
+impl Material2d for GridMaterial {
+    fn fragment_shader() -> bevy::render::render_resource::ShaderRef {
+        "shaders/grid.wgsl".into()
+    }
+}
+
+pub fn spawn_grid(
+    mut coms: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut mats: ResMut<Assets<GridMaterial>>,
+) {
+
+    coms.spawn().insert_bundle(MaterialMesh2dBundle {
+        mesh: meshes.add(Mesh::from(shape::Cube { size: 1000.0 })).into(),
+        transform: Transform::from_xyz(0.0, 0.0, 0.0),
+        material: mats.add(GridMaterial { width: 2.0, size: Vec2::splat(15.0), visible: 1 }),
+        ..default()
+    });
+}
+
+pub fn update_grid_shader(
+    snap_grid: Res<crate::SnapGrid>,
+    handles: Query<&Handle<GridMaterial>>,
+    mut mats: ResMut<Assets<GridMaterial>>,
+) {
+    for h in handles.iter() {
+        if let Some(mut m) = mats.get_mut(h) {
+            m.size = Vec2::new(snap_grid.width, snap_grid.height);
+            m.visible = snap_grid.visible as u32;
+        }
+    }
+}
+
+pub fn update_grid_position(
+    cam: Query<&GlobalTransform, With<MainCamera>>,
+    mut grid: Query<&mut Transform, With<Handle<GridMaterial>>>, 
+) {
+    let mut cam_pos = cam.get_single().map(|c| c.translation()).unwrap_or(Vec3::ZERO);
+    cam_pos.z = 0.0;
+    for mut t in grid.iter_mut() {
+        t.translation = cam_pos;
+    }
+}

src/lib.rs

@@ -1,5 +1,3 @@
-#![feature(let_chains)]
-
 use bevy::prelude::*;
 use bevy_egui::egui;
 
@@ -7,6 +5,7 @@ pub mod create;
 pub mod helpers;
 pub mod modify;
 pub mod ui;
+pub mod infinite_grid;
 pub use modify::modify_sys;
 pub use create::create_sys;
 pub use helpers::*;
@@ -17,11 +16,12 @@ pub struct SnapGrid {
     pub height: f32,
     pub snap: bool,
     pub offset: Vec2,
+    pub visible: bool,
 }
 impl SnapGrid {
     pub fn snap_to_grid(&self, v: Vec2) -> Vec2 {
         if self.snap {
-            let w = v - self.offset;
+            let w = v - self.offset + 0.5 * Vec2::new(self.width.copysign(v.x), self.height.copysign(v.y));
             let snapped = Vec2::new(w.x - w.x % self.width, w.y - w.y % self.height);
 
             snapped + self.offset
@@ -33,7 +33,7 @@ impl SnapGrid {
 }
 impl Default for SnapGrid {
     fn default() -> Self {
-        Self { width: 15.0, height: 15.0, snap: false, offset: Vec2::ZERO }
+        Self { width: 15.0, height: 15.0, snap: false, offset: Vec2::ZERO, visible: true }
     }
 }
 

src/main.rs

@@ -1,6 +1,7 @@
 use bevy::ecs::schedule::ShouldRun;
 use bevy::input::mouse::{MouseMotion, MouseWheel};
 use bevy::math::Vec3Swizzles;
+use bevy::sprite::Material2dPlugin;
 use bevy::{prelude::*, window::PresentMode, winit::WinitSettings};
 use bevy_egui::{egui, EguiContext, EguiPlugin};
 use bevy_prototype_lyon::prelude::*;
@@ -31,11 +32,16 @@ fn main() {
         .add_plugins(DefaultPlugins)
         .add_plugin(EguiPlugin)
         .add_plugin(ShapePlugin)
+        .add_plugin(Material2dPlugin::<infinite_grid::GridMaterial>::default())
     ;
 
     app
         .add_startup_system(configure_visuals)
         .add_startup_system(basic_setup_sys)
+        .add_startup_system(infinite_grid::spawn_grid)
+    ;
+
+    app
         .add_system(create_sys.with_run_criteria(|state: Res<UiState>, mut ec: ResMut<EguiContext>| 
             if !ec.ctx_mut().is_pointer_over_area() && state.current_action == Action::Create { ShouldRun::Yes } else { ShouldRun::No }
         ))
@@ -51,6 +57,8 @@ fn main() {
         .add_system(drag_camera_sys)
         .add_system(zoom_camera_sys)
         .add_system(scale_points)
+        .add_system(infinite_grid::update_grid_shader)
+        .add_system(infinite_grid::update_grid_position)
     ;
     
     app.run();

src/ui.rs

@@ -88,7 +88,11 @@ pub fn grid_window_sys(
         .title_bar(true)
         .resizable(false)
         .show(egui_ctx.ctx_mut(), |ui| {
-            ui.checkbox(&mut grid.snap, "Snap Enabled");
+            ui.horizontal(|hui| {
+                hui.checkbox(&mut grid.snap, "Snap Enabled");
+                hui.checkbox(&mut grid.visible, "Visible");
+            });
+
             ui.label("Grid size:");
             ui.horizontal(|hui| {
                 hui.label("Width:");