From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Tue, 28 Nov 2017 16:45:07 +0000 (+0100)
Subject: generate base color for creature
X-Git-Url: http://git.localhorst.tv/?p=blobs.git;a=commitdiff_plain;h=5b2ab168a9b3c05082bd9cd924f548bc90fc8efa

generate base color for creature
---

diff --git a/src/creature/Genome.hpp b/src/creature/Genome.hpp
index 882a8a2..a7be0e1 100644
--- a/src/creature/Genome.hpp
+++ b/src/creature/Genome.hpp
@@ -57,6 +57,10 @@ struct Genome {
 	};
 	std::vector<Composition> composition;
 
+	math::Distribution base_hue;
+	math::Distribution base_saturation;
+	math::Distribution base_lightness;
+
 	void Configure(Creature &) const;
 
 	static PropertySet<double> Instantiate(
diff --git a/src/creature/creature.cpp b/src/creature/creature.cpp
index 6c9fb85..1196a3c 100644
--- a/src/creature/creature.cpp
+++ b/src/creature/creature.cpp
@@ -322,6 +322,9 @@ void Spawn(Creature &c, world::Planet &p) {
 	genome.properties.Death().mass = { 0.9, 0.05 };
 	genome.properties.Death().fertility = { 0.0, 0.0 };
 
+	glm::dvec3 color_avg(0.0);
+	double color_divisor = 0.0;
+
 	if (p.HasAtmosphere()) {
 		genome.composition.push_back({
 			p.Atmosphere(),    // resource
@@ -330,6 +333,8 @@ void Spawn(Creature &c, world::Planet &p) {
 			{ 0.1,  0.0005 },  // penalty
 			{ 0.0,  0.0 },     // growth
 		});
+		color_avg += c.GetSimulation().Resources()[p.Atmosphere()].base_color;
+		color_divisor += 0.1;
 	}
 	if (liquid > -1) {
 		genome.composition.push_back({
@@ -339,17 +344,28 @@ void Spawn(Creature &c, world::Planet &p) {
 			{ 0.01, 0.002 }, // penalty
 			{ 0.1, 0.0 },   // growth
 		});
+		color_avg += c.GetSimulation().Resources()[liquid].base_color;
+		color_divisor += 0.5;
 	}
 	if (solid > -1) {
 		genome.composition.push_back({
 			solid,             // resource
 			{ 0.4,   0.01 },   // mass
-			//{ 0.1,   0.001 },  // intake
 			{ 0.4,   0.001 },  // intake
 			{ 0.001, 0.0001 }, // penalty
 			{ 10.0,  0.002 },   // growth
 		});
+		color_avg += c.GetSimulation().Resources()[solid].base_color;
+		color_divisor += 1.0;
+	}
+
+	if (color_divisor > 0.001) {
+		color_avg /= color_divisor;
 	}
+	glm::dvec3 hsl = rgb2hsl(color_avg);
+	genome.base_hue = { hsl.x, 0.01 };
+	genome.base_saturation = { hsl.y, 0.01 };
+	genome.base_lightness = { hsl.z, 0.01 };
 
 	genome.Configure(c);
 }
diff --git a/src/math/glm.hpp b/src/math/glm.hpp
index 4b1bf33..46843db 100644
--- a/src/math/glm.hpp
+++ b/src/math/glm.hpp
@@ -5,6 +5,7 @@
 #  define GLM_FORCE_RADIANS 1
 #endif
 
+#include <algorithm>
 #include <limits>
 #include <glm/glm.hpp>
 #include <glm/gtx/norm.hpp>
@@ -35,5 +36,29 @@ inline bool anynan(const T &v) noexcept {
 	return glm::any(glm::isnan(v));
 }
 
+template<class T>
+inline T rgb2hsl(const T &rgb) {
+	using Vec4 = glm::tvec4<typename T::value_type>;
+	const Vec4 K(0.0, -1.0/3.0, 2.0/3.0, -1.0);
+	const Vec4 p(glm::mix(Vec4(rgb.z, rgb.y, K.w, K.z), Vec4(rgb.y, rgb.z, K.x, K.y), rgb.y < rgb.z ? 0.0 : 1.0));
+	const Vec4 q(glm::mix(Vec4(p.x, p.y, p.w, rgb.x), Vec4(rgb.x, p.y, p.z, p.x), rgb.x < p.x ? 0.0 : 1.0));
+	const typename T::value_type d = q.x - std::min(q.w, q.y);
+	const typename T::value_type e = 1.0e-10;
+	T hsl = rgb;
+	hsl.x = std::abs(q.z + (q.w - q.y) / (6.0 * d + e));
+	hsl.y = d / (q.x + e);
+	hsl.z = q.x;
+	return hsl;
+}
+
+template<class T>
+inline T hsl2rgb(const T &hsl) {
+	using Vec3 = glm::tvec3<typename T::value_type>;
+	using Vec4 = glm::tvec4<typename T::value_type>;
+	const Vec4 K(0.0, -1.0/3.0, 2.0/3.0, -1.0);
+	const Vec3 p(glm::abs(glm::fract(Vec3(hsl.h) + Vec3(K)) * 6.0 - Vec3(K.w)));
+	T rgb = hsl.z * glm::mix(Vec3(K.x), glm::clamp(p - Vec3(K.x), 0.0, 1.0), hsl.y);
+	return rgb;
+}
 
 #endif