change shader version to 100 for android support

shaders/sun_100.fs

@@ -0,0 +1,36 @@
+#version 100
+
+precision mediump float;
+
+varying vec2 fragTexCoord;
+varying vec4 fragColor;
+
+
+uniform vec3 color;
+uniform float sun_radius;
+uniform float start_transperency;
+
+vec2 offset = vec2(1.0, 1.0);
+float sun_end = 1.0;
+
+void main()
+{
+    offset.x -= fragTexCoord.x * 2.0;
+    offset.y -= fragTexCoord.y * 2.0;
+    float radius = length(offset);
+
+    if(radius < sun_radius){
+
+        gl_FragColor = vec4(color, 1.0);
+
+    }else if(radius < sun_end){
+
+        float gradient = radius;
+        gradient -= sun_radius;
+        gradient = gradient / (sun_end - sun_radius) * start_transperency;
+        gl_FragColor = vec4(color, start_transperency - gradient);
+
+    }else{
+        gl_FragColor = vec4(color, 0.0);
+    }
+}

src/canvas/Sun.cpp

@@ -5,37 +5,37 @@
 #include <raylib.h>
 #include <rlgl.h>
 
-const char* sun_shader = "#version 330\n\
-in vec2 fragTexCoord;\
-in vec4 fragColor;\
-out vec4 finalColor;\
+const char* sun_shader_100 = "#version 100\n\
+precision mediump float;\
+varying vec2 fragTexCoord;\
+varying vec4 fragColor;\
 uniform vec3 color;\
 uniform float sun_radius;\
 uniform float start_transperency;\
-vec2 offset = vec2(1.0f, 1.0f);\
-float sun_end = 1.0f;\
+vec2 offset = vec2(1.0, 1.0);\
+float sun_end = 1.0;\
 void main()\
 {\
-    offset.x -= fragTexCoord.x * 2;\
-    offset.y -= fragTexCoord.y * 2;\
-    float radius = length(offset);\
-    if (radius < sun_radius) {\
-        finalColor = vec4(color, 1.0f);\
-    }\
-    else if (radius < sun_end) {\
-        float gradient = radius;\
-        gradient -= sun_radius;\
-        gradient = gradient / (sun_end - sun_radius) * start_transperency;\
-        finalColor = vec4(color, start_transperency - gradient);\
-    }\
-    else {\
-        finalColor = vec4(color, 0.0f);\
-    }\
+  offset.x -= fragTexCoord.x * 2.0;\
+  offset.y -= fragTexCoord.y * 2.0;\
+  float radius = length(offset);\
+  if (radius < sun_radius) {\
+    gl_FragColor = vec4(color, 1.0);\
+  }\
+  else if (radius < sun_end) {\
+    float gradient = radius;\
+    gradient -= sun_radius;\
+    gradient = gradient / (sun_end - sun_radius) * start_transperency;\
+    gl_FragColor = vec4(color, start_transperency - gradient);\
+  }\
+  else {\
+    gl_FragColor = vec4(color, 0.0);\
+  }\
 }";
 
 void Sun::init()
 {
-  shader = LoadShaderFromMemory(0, sun_shader);
+  shader = LoadShaderFromMemory(0, sun_shader_100);
   target = LoadRenderTexture(sizeTexute, sizeTexute);
 
   sun_radius_loc = GetShaderLocation(shader, "sun_radius");