Fix depth texture sampler

Use sampler2DShadow instead of simple sampler2D.

Author: Tirondzo

package.json

@@ -5,20 +5,20 @@
     "build": "webpack --env.local --env.analyze --profile --json > stats.json"
   },
   "dependencies": {
-    "@loaders.gl/core": "^1.0.3",
-    "@loaders.gl/draco": "^1.0.3",
-    "@luma.gl/addons": "^7.0.1",
-    "@luma.gl/constants": "^7.0.1",
-    "@luma.gl/core": "^7.0.1",
-    "copy-webpack-plugin": "^5.0.3",
+    "@loaders.gl/core": "1.0.3",
+    "@loaders.gl/draco": "1.0.3",
+    "@luma.gl/addons": "7.0.1",
+    "@luma.gl/constants": "7.0.1",
+    "@luma.gl/core": "7.0.1",
+    "copy-webpack-plugin": "5.0.3",
     "keycode-js": "^1.0.4",
-    "math.gl": "^2.3.1",
+    "math.gl": "2.3.3",
     "stats.js": "^0.17.0"
   },
   "devDependencies": {
     "html-webpack-plugin": "^3.2.0",
-    "webpack": "^4.3.0",
-    "webpack-cli": "^3.3.2",
-    "webpack-dev-server": "^3.1.1"
+    "webpack": "^4.41.2",
+    "webpack-cli": "^3.3.10",
+    "webpack-dev-server": "^3.9.0"
   }
 }

shaders.js

@@ -440,7 +440,8 @@ in mat3 pbr_vTBN;
 in vec3 pbr_vNormal;
 #endif
 #endif
-uniform sampler2D u_ShadowMap;
+precision highp sampler2DShadow;
+uniform sampler2DShadow u_ShadowMap;
 in vec4 shadowCoord;
 
 struct PBRInfo
@@ -693,7 +694,7 @@ vec4 pbr_filterColor(vec4 colorUnused)
       float attenuation = getPointLightAttenuation(lighting_uPointLight[i], distance(lighting_uPointLight[i].position, pbr_vPosition));
       //out_shadow = shadowCoord.z;
       out_shadow = 1.0;
-      if(i == 0 && (texture(u_ShadowMap, shadowCoord.xy).r < shadowCoord.z - 0.005)) out_shadow = 0.0;
+      if(i == 0 && (texture(u_ShadowMap, vec3(shadowCoord.xy,shadowCoord.z - 0.005)) <= 0.0)) out_shadow = 0.0;
       color += calculateFinalColor(pbrInputs, lighting_uPointLight[i].color / attenuation)*out_shadow;
     }
   }
@@ -731,7 +732,7 @@ vec4 pbr_filterColor(vec4 colorUnused)
   void main(void) {
     fragmentColor = pbr_filterColor(vec4(0));
     //Visual debug: Shadow area
-    //if(texture(u_ShadowMap, shadowCoord.xy).z < shadowCoord.z - 0.005) fragmentColor=vec4(1,0,0,1);
+    //if(texture(u_ShadowMap, vec3(shadowCoord.xy,shadowCoord.z - 0.005)) > 0.0) fragmentColor=vec4(1,0,0,1);
   }
 `;