+*/
+
+SHADER_DEFINE( shader_ball,
+ // VERTEX
+ "layout (location=0) in vec2 a_co;"
+ "uniform vec2 uOffset;"
+ "uniform mat3 uPv;"
+ ""
+ "out vec4 aTexCoords;"
+ ""
+ "void main()"
+ "{"
+ // Vertex transform
+ "vec3 worldpos = vec3( a_co * 0.5 - 0.25 + uOffset, 1.0 );"
+ "gl_Position = vec4( uPv * worldpos, 1.0 );"
+
+ // Create texture coords
+ "aTexCoords = vec4( a_co, worldpos.xy );"
+ "}",
+
+ // FRAGMENT
+ "out vec4 FragColor;"
+ ""
+ "uniform sampler2D uTexMain;"
+ "uniform vec3 uColour;"
+ "uniform vec2 uTexOffset;"
+ ""
+ "in vec4 aTexCoords;"
+ ""
+ "void main()"
+ "{"
+ "vec2 center_coords = aTexCoords.xy - 0.5;"
+ "vec2 center_coords_sqr = center_coords*center_coords;"
+ "float circle_factor = smoothstep( 0.07, 0.0625, center_coords_sqr.x+center_coords_sqr.y );"
+
+ "float bulge_amt = center_coords_sqr.x+center_coords_sqr.y;"
+ "vec2 warped_coords = aTexCoords.zw+uTexOffset - center_coords;"
+ "vec4 noise_sample = texture( uTexMain, warped_coords );"
+
+ "float rim_light = (center_coords_sqr.x+center_coords_sqr.y)*15.0;"
+
+ "vec2 shadow_coords = center_coords + vec2(0.02,0.07);"
+ "vec2 shadow_coords_sqr = shadow_coords*shadow_coords;"
+ //"float shadow = exp(-abs(shadow_coords_sqr.x+shadow_coords_sqr.y)*20.0);"
+ "float shadow = exp(-((shadow_coords_sqr.x+shadow_coords_sqr.y)-0.0125)*15.0);"
+
+ "vec3 marble_comp = uColour*0.9 + (noise_sample.x*0.7+pow(rim_light,3.0)*2.0) * 0.1;"
+ "vec4 colour_comp = mix( vec4(0.74,0.53,0.34,shadow), vec4(marble_comp,1.0), circle_factor );"
+
+ "FragColor = colour_comp;"
+ "}"
+ ,
+ UNIFORMS({ "uTexMain", "uColour", "uOffset", "uPv", "uTexOffset" })
+)