forum.freeciv.org

Code: Select all

varying vec2 vUv;
varying vec3 vNormal;
varying vec3 vPosition;
varying vec3 vPosition_camera;

void main()
{
  vUv = uv;
  vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
  gl_Position = projectionMatrix * mvPosition;
  vPosition_camera = gl_Position.xyz;
  vNormal = normal;
  vPosition = position;
}

Code: Select all

// At global scope:
varying vec3 vPosition;
varying vec3 vPosition_camera;
// End of main():
  float x = clamp((vPosition.y - 30.) / 15., 0., 1.);
  vec4 Cb = texture2D(beach, vec2(vUv.x * 50.0, vUv.y * 50.0));
  c = Cb.rgb * (1. - x) + c * x;

  vec3 light = vec3(0.8, 0.6, 0.7);
  light = normalize(light);

  float dProd = dot(vNormal, light);
  float shade_factor = 0.4 + 0.6 * max(0., dProd);
    
  vec3 ambiant = vec3(0.27, 0.55, 1.);
  float ambiant_factor = 0.075 * (vPosition_camera.z - 550.) / 400.;
  gl_FragColor.rgb = (1. - ambiant_factor) * c * shade_factor + ambiant * ambiant_factor;
}

Code: Select all

if (vPosition.y < 53. && vPosition.y > 49.) {
  vec4 Cb = texture2D(desert, vec2(vUv.x * 50.0, vUv.y * 50.0));
  c = Cb.rgb;
}

Code: Select all

average_tile_height = medium_factor * distance_to_sea + big_factor * terrain_modification + small_factor * mean(terrain_modification of neighbouring tiles)