Add textures

src/graphics/rendering/shaders/distance-fs.glsl

@@ -6,6 +6,8 @@ uniform float maxMinDistance;
 uniform float distanceNdcPixelSize;
 in vec2 position;
 
+#define WEBGL2_IS_AVAILABLE
+
 {macroDefinitions}
 
 {declarations}

src/graphics/rendering/shaders/random-fs-100.glsl

@@ -0,0 +1,32 @@
+#version 100
+
+precision lowp float;
+
+varying vec2 uvCoordinates;
+
+uniform float scale;
+uniform float amplitude;
+
+float noise(float x){
+    return fract(sin(x) * 43758.5453123) / 100.0;
+}
+
+float terrain(float x) {
+    float result = 0.0;
+
+    float frequency = 0.01;
+    float amplitude = 1.0;
+  
+    const float pi = 3.141592654;
+    for (int i = 0; i < 8; i++) {
+        result += sin(2.0 * pi * x * frequency - 2.0 * pi * noise(float(i) * 200.0)) * amplitude;
+        frequency *= 1.5;
+        amplitude /= 1.2;
+  }
+
+    return result;
+}
+
+void main() {
+    gl_FragColor = vec4(vec3(terrain(uvCoordinates.x * scale) * amplitude + 0.5), 1.0);
+}

src/graphics/rendering/shaders/random-fs.glsl

@@ -0,0 +1,34 @@
+#version 300 es
+
+precision lowp float;
+
+in vec2 uvCoordinates;
+
+uniform float scale;
+uniform float amplitude;
+
+float noise(float x){
+    return fract(sin(x) * 43758.5453123) / 100.0;
+}
+
+float terrain(float x) {
+    float result = 0.0;
+
+    float frequency = 0.01;
+    float amplitude = 1.0;
+  
+    const float pi = 3.141592654;
+    for (int i = 0; i < 8; i++) {
+        result += sin(2.0 * pi * x * frequency - 2.0 * pi * noise(float(i) * 200.0)) * amplitude;
+        frequency *= 1.5;
+        amplitude /= 1.2;
+    }
+
+    return result;
+}
+
+out vec4 fragmentColor;
+
+void main() {
+    fragmentColor = vec4(vec3(terrain(uvCoordinates.x * scale) * amplitude + 0.5), 1.0);
+}

src/graphics/rendering/shaders/random-vs-100.glsl

@@ -0,0 +1,18 @@
+#version 100
+
+precision lowp float;
+
+attribute vec4 vertexPosition;
+varying vec2 uvCoordinates;
+
+void main() {
+    gl_Position = vec4(vertexPosition.xy, 0.0, 1.0);
+
+    uvCoordinates = (
+        vec3(vertexPosition.xy, 1.0) 
+      * mat3(
+        0.5, 0.0, 0.5,
+        0.0, 0.5, 0.5,
+        0.0, 0.0, 1.0
+    )).xy;
+}

src/graphics/rendering/shaders/random-vs.glsl

@@ -0,0 +1,18 @@
+#version 300 es
+
+precision lowp float;
+
+in vec4 vertexPosition;
+out vec2 uvCoordinates;
+
+void main() {
+    gl_Position = vec4(vertexPosition.xy, 0.0, 1.0);
+
+    uvCoordinates = (
+        vec3(vertexPosition.xy, 1.0) 
+      * mat3(
+        0.5, 0.0, 0.5,
+        0.0, 0.5, 0.5,
+        0.0, 0.0, 1.0
+    )).xy;
+}