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author hop311 <hop3114@gmail.com>2023-11-17 19:45:15 +0100
committer hop311 <hop3114@gmail.com>2023-11-17 20:22:29 +0100
commitaefc61a1aff091e31436c60d004531b5905cecba (patch)
tree79a69cb7601bf1367e4ee4f10ebf61b698319bf3 /game
parent3490e740a7235dce236fc2ce973e5cbf64d6e727 (diff)
Cosmetic terrain map colour tinting
Diffstat (limited to 'game')
-rw-r--r--game/src/Game/GameSession/TerrainMap.gdshader72
-rw-r--r--game/src/Game/GlobalClass/ShaderManager.gd37
2 files changed, 83 insertions, 26 deletions
diff --git a/game/src/Game/GameSession/TerrainMap.gdshader b/game/src/Game/GameSession/TerrainMap.gdshader
index ff8708a..35a108b 100644
--- a/game/src/Game/GameSession/TerrainMap.gdshader
+++ b/game/src/Game/GameSession/TerrainMap.gdshader
@@ -15,13 +15,23 @@ uniform sampler2DArray terrain_tex: source_color, repeat_enable, filter_linear;
// The number of times the terrain textures should tile vertically
uniform float terrain_tile_factor;
// Map stripe mask texture
-uniform sampler2D stripe_tex: source_color, repeat_enable, filter_nearest;
+uniform sampler2D stripe_tex: source_color, repeat_enable, filter_linear;
// The number of times the stripe texture should tile vertically
uniform float stripe_tile_factor;
+// Land map tint
+uniform sampler2D colormap_land_tex: source_color, repeat_enable, filter_linear;
+// Water map tint
+uniform sampler2D colormap_water_tex: source_color, repeat_enable, filter_linear;
const vec3 highlight_colour = vec3(1.0);
-vec3 get_terrain_colour(vec2 uv, vec2 corner, vec2 half_pixel_size, vec2 terrain_uv, vec2 stripe_uv) {
+vec3 get_terrain_colour(
+ vec2 uv, vec2 corner, vec2 half_pixel_size, // Components for calculating province sampling UV
+ float stripe_mask, // Stripe mask value - between 0 (base) and 1 (stripe)
+ vec2 terrain_uv, // UV coordinates scaled for terrain texture tiling
+ vec3 land_tint_colour, vec3 water_tint_colour // Colours for tinting terrain
+) {
+
uvec3 province_data = read_uvec3(fma(corner, half_pixel_size, uv));
uint province_index = uvec2_to_uint(province_data.rg);
uint terrain_index = province_data.b;
@@ -30,33 +40,63 @@ vec3 get_terrain_colour(vec2 uv, vec2 corner, vec2 half_pixel_size, vec2 terrain
vec4 province_base_colour = texelFetch(province_colour_tex, ivec2(province_data.rg), 0);
province_data.r += 1u; // Add 1 to "x coordinate" to move from base to strip colour
vec4 province_stripe_colour = texelFetch(province_colour_tex, ivec2(province_data.rg), 0);
- float stripe = texture(stripe_tex, stripe_uv).b; // Stripe mask value - 0 for base, 1 for stripe
- vec4 province_colour = mix(province_base_colour, province_stripe_colour, stripe);
+ vec4 province_colour = mix(province_base_colour, province_stripe_colour, stripe_mask);
vec3 terrain_colour = texture(terrain_tex, vec3(terrain_uv, float(terrain_index))).rgb;
- vec3 mixed_colour = mix(terrain_colour, province_colour.rgb, province_colour.a);
+ vec3 tint_colour = mix(land_tint_colour, water_tint_colour, float(terrain_index == 0u));
+ vec3 tinted_terrain_colour = mix(terrain_colour, tint_colour, 0.3);
+ vec3 mixed_colour = mix(tinted_terrain_colour, province_colour.rgb, province_colour.a);
+
+ float highlight_mix_val = 0.1 * (float(province_index == hover_index) + float(province_index == selected_index));
+ return mix(mixed_colour, highlight_colour, highlight_mix_val);
+}
- float mix_val = 0.1 * (float(province_index == hover_index) + float(province_index == selected_index));
- return mix(mixed_colour, highlight_colour, mix_val);
+// Rescale UV coordinates to remove squashing caused by normalisation
+vec2 denormalise(vec2 uv, vec2 dims) {
+ return vec2(uv.x * dims.x / dims.y, uv.y);
}
vec3 mix_terrain_colour(vec2 uv) {
vec2 map_size = vec2(textureSize(province_shape_tex, 0).xy) * province_shape_subdivisions;
- vec2 pixel_offset = fract(fma(uv, map_size, vec2(0.5)));
+ vec2 uv_centred = fma(uv, map_size, vec2(0.5));
+ vec2 pixel_offset = fract(uv_centred);
vec2 half_pixel_size = 0.49 / map_size;
- // UV coords adjusted to remove squashing caused by normalisation relative to map dimensions.
- vec2 unscaled_uv = vec2(uv.x * map_size.x / map_size.y, uv.y);
+ // UV coords adjusted to remove squashing caused by normalisation relative to map dimensions
+ vec2 unscaled_uv = denormalise(uv, map_size);
- vec2 terrain_uv = unscaled_uv * terrain_tile_factor;
vec2 stripe_uv = unscaled_uv * stripe_tile_factor;
+ // Stripe mask value - between 0 (base) and 1 (stripe)
+ float stripe_mask = texture(stripe_tex, stripe_uv).b;
+
+ vec2 terrain_uv = unscaled_uv * terrain_tile_factor;
+ vec2 colormap_uv = vec2(uv.x, 1.0 - uv.y);
+ vec3 colormap_land_colour = texture(colormap_land_tex, colormap_uv).rgb;
+ vec3 colormap_water_colour = texture(colormap_water_tex, colormap_uv).rgb;
return mix(
- mix(get_terrain_colour(uv, vec2(-1, -1), half_pixel_size, terrain_uv, stripe_uv),
- get_terrain_colour(uv, vec2(+1, -1), half_pixel_size, terrain_uv, stripe_uv), pixel_offset.x),
- mix(get_terrain_colour(uv, vec2(-1, +1), half_pixel_size, terrain_uv, stripe_uv),
- get_terrain_colour(uv, vec2(+1, +1), half_pixel_size, terrain_uv, stripe_uv), pixel_offset.x),
- pixel_offset.y);
+ mix(
+ get_terrain_colour(
+ uv, vec2(-1, -1), half_pixel_size, stripe_mask,
+ terrain_uv, colormap_land_colour, colormap_water_colour
+ ),
+ get_terrain_colour(
+ uv, vec2(+1, -1), half_pixel_size, stripe_mask,
+ terrain_uv, colormap_land_colour, colormap_water_colour
+ ), pixel_offset.x
+ ),
+ mix(
+ get_terrain_colour(
+ uv, vec2(-1, +1), half_pixel_size, stripe_mask,
+ terrain_uv, colormap_land_colour, colormap_water_colour
+ ),
+ get_terrain_colour(
+ uv, vec2(+1, +1), half_pixel_size, stripe_mask,
+ terrain_uv, colormap_land_colour, colormap_water_colour
+ ), pixel_offset.x
+ ),
+ pixel_offset.y
+ );
}
void fragment() {
diff --git a/game/src/Game/GlobalClass/ShaderManager.gd b/game/src/Game/GlobalClass/ShaderManager.gd
index 1af606c..ace3c3a 100644
--- a/game/src/Game/GlobalClass/ShaderManager.gd
+++ b/game/src/Game/GlobalClass/ShaderManager.gd
@@ -10,6 +10,16 @@ const param_terrain_tex : StringName = &"terrain_tex"
const param_terrain_tile_factor : StringName = &"terrain_tile_factor"
const param_stripe_tex : StringName = &"stripe_tex"
const param_stripe_tile_factor : StringName = &"stripe_tile_factor"
+const param_colormap_land_tex : StringName = &"colormap_land_tex"
+const param_colormap_water_tex : StringName = &"colormap_water_tex"
+
+func _set_shader_texture(shader_material : ShaderMaterial, texture_path : StringName, texture_param : StringName) -> Error:
+ var texture := AssetManager.get_texture(texture_path)
+ if texture == null:
+ push_error("Failed to get texture: ", texture_path)
+ return FAILED
+ shader_material.set_shader_parameter(texture_param, texture)
+ return OK
func set_up_shader(material : Material, add_cosmetic_textures : bool) -> Error:
# Shader Material
@@ -21,38 +31,45 @@ func set_up_shader(material : Material, add_cosmetic_textures : bool) -> Error:
return FAILED
var shader_material : ShaderMaterial = material
+ var ret : Error = OK
+
# Province shape texture
var province_shape_texture := GameSingleton.get_province_shape_texture()
if province_shape_texture == null:
push_error("Failed to get province shape texture!")
- return FAILED
+ ret = FAILED
shader_material.set_shader_parameter(param_province_shape_tex, province_shape_texture)
var subdivisions := GameSingleton.get_province_shape_image_subdivisions()
if subdivisions.x < 1 or subdivisions.y < 1:
push_error("Invalid province shape image subdivision: ", subdivisions.x, "x", subdivisions.y)
- return FAILED
+ ret = FAILED
shader_material.set_shader_parameter(param_province_shape_subdivisions, Vector2(subdivisions))
if add_cosmetic_textures:
+
# Province colour texture
var map_province_colour_texture := GameSingleton.get_province_colour_texture()
if map_province_colour_texture == null:
push_error("Failed to get province colour image!")
- return FAILED
+ ret = FAILED
shader_material.set_shader_parameter(param_province_colour_tex, map_province_colour_texture)
# Terrain texture
var terrain_texture := GameSingleton.get_terrain_texture()
if terrain_texture == null:
push_error("Failed to get terrain texture!")
- return FAILED
+ ret = FAILED
shader_material.set_shader_parameter(param_terrain_tex, terrain_texture)
# Stripe texture
- var stripe_texture := AssetManager.get_texture(&"map/terrain/stripes.dds")
- if stripe_texture == null:
- push_error("Failed to get stripe texture!")
- return FAILED
- shader_material.set_shader_parameter(param_stripe_tex, stripe_texture)
+ if _set_shader_texture(shader_material, &"map/terrain/stripes.dds", param_stripe_tex) != OK:
+ ret = FAILED
- return OK
+ # Land colormap
+ if _set_shader_texture(shader_material, &"map/terrain/colormap.dds", param_colormap_land_tex) != OK:
+ ret = FAILED
+ # Water colormap
+ if _set_shader_texture(shader_material, &"map/terrain/colormap_water.dds", param_colormap_water_tex) != OK:
+ ret = FAILED
+
+ return ret