]> git.localhorst.tv Git - blobs.git/blobdiff - src/world/world.cpp
primitive collision response
[blobs.git] / src / world / world.cpp
index 0b1260f8673d8a0eb1b054bec81847b61602d711..9cd1e02df56a7f185a299f3337248cfbb22f417e 100644 (file)
@@ -1,4 +1,5 @@
 #include "Body.hpp"
+#include "CreatureCreatureCollision.hpp"
 #include "Orbit.hpp"
 #include "Planet.hpp"
 #include "Resource.hpp"
@@ -8,12 +9,14 @@
 #include "Tile.hpp"
 #include "TileType.hpp"
 
-#include "../const.hpp"
 #include "../app/Assets.hpp"
+#include "../creature/Composition.hpp"
 #include "../creature/Creature.hpp"
 #include "../graphics/Viewport.hpp"
-#include "../rand/OctaveNoise.hpp"
-#include "../rand/SimplexNoise.hpp"
+#include "../math/const.hpp"
+#include "../math/geometry.hpp"
+#include "../math/OctaveNoise.hpp"
+#include "../math/SimplexNoise.hpp"
 
 #include <algorithm>
 #include <cmath>
@@ -138,12 +141,28 @@ glm::dmat4 Body::FromUniverse() const noexcept {
        return m;
 }
 
+namespace {
+std::vector<creature::Creature *> ccache;
+std::vector<CreatureCreatureCollision> collisions;
+}
+
 void Body::Tick(double dt) {
        rotation += dt * AngularMomentum() / Inertia();
        Cache();
-       for (creature::Creature *c : Creatures()) {
+       ccache = Creatures();
+       for (creature::Creature *c : ccache) {
                c->Tick(dt);
        }
+       // first remove creatures so they don't collide
+       for (auto c = Creatures().begin(); c != Creatures().end();) {
+               if ((*c)->Removable()) {
+                       delete *c;
+                       c = Creatures().erase(c);
+               } else {
+                       ++c;
+               }
+       }
+       CheckCollision();
 }
 
 void Body::Cache() noexcept {
@@ -166,6 +185,34 @@ void Body::Cache() noexcept {
                * glm::eulerAngleY(-rotation);
 }
 
+void Body::CheckCollision() noexcept {
+       if (Creatures().size() < 2) return;
+       collisions.clear();
+       auto end = Creatures().end();
+       for (auto i = Creatures().begin(); i != end; ++i) {
+               math::AABB i_box((*i)->CollisionBox());
+               glm::dmat4 i_mat((*i)->CollisionTransform());
+               for (auto j = (i + 1); j != end; ++j) {
+                       glm::dvec3 diff((*i)->GetSituation().Position() - (*j)->GetSituation().Position());
+                       double max_dist = ((*i)->Size() + (*j)->Size()) * 1.74;
+                       if (length2(diff) > max_dist * max_dist) continue;
+                       math::AABB j_box((*j)->CollisionBox());
+                       glm::dmat4 j_mat((*j)->CollisionTransform());
+                       glm::dvec3 normal;
+                       double depth;
+                       if (Intersect(i_box, i_mat, j_box, j_mat, normal, depth)) {
+                               collisions.push_back({ **i, **j, normal, depth });
+                       }
+               }
+       }
+       for (auto &c : collisions) {
+               c.A().GetSituation().Move(c.Normal() * (c.Depth() * -0.5));
+               c.B().GetSituation().Move(c.Normal() * (c.Depth() * 0.5));
+               // TODO: adjust velocities as well
+               // TODO: notify participants so they can be annoyed
+       }
+}
+
 void Body::AddCreature(creature::Creature *c) {
        creatures.push_back(c);
 }
@@ -178,6 +225,18 @@ void Body::RemoveCreature(creature::Creature *c) {
 }
 
 
+CreatureCreatureCollision::~CreatureCreatureCollision() {
+}
+
+const glm::dvec3 &CreatureCreatureCollision::APos() const noexcept {
+       return a->GetSituation().Position();
+}
+
+const glm::dvec3 &CreatureCreatureCollision::BPos() const noexcept {
+       return b->GetSituation().Position();
+}
+
+
 Orbit::Orbit()
 : sma(1.0)
 , ecc(0.0)
@@ -334,34 +393,34 @@ void Planet::BuildVAO(const Set<TileType> &ts) {
                        for (int y = 0; y < sidelength; ++y) {
                                for (int x = 0; x < sidelength; ++x, ++index) {
                                        float tex = ts[TileAt(surface, x, y).type].texture;
-                                       const float tex_u_begin = surface < 3 ? 1.0f : 0.0f;
-                                       const float tex_u_end = surface < 3 ? 0.0f : 1.0f;
+                                       const float tex_v_begin = surface < 3 ? 1.0f : 0.0f;
+                                       const float tex_v_end = surface < 3 ? 0.0f : 1.0f;
                                        attrib[4 * index + 0].position[(surface + 0) % 3] = x + 0 - offset;
                                        attrib[4 * index + 0].position[(surface + 1) % 3] = y + 0 - offset;
                                        attrib[4 * index + 0].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
-                                       attrib[4 * index + 0].tex_coord[0] = tex_u_begin;
-                                       attrib[4 * index + 0].tex_coord[1] = 1.0f;
+                                       attrib[4 * index + 0].tex_coord[0] = 0.0f;
+                                       attrib[4 * index + 0].tex_coord[1] = tex_v_begin;
                                        attrib[4 * index + 0].tex_coord[2] = tex;
 
                                        attrib[4 * index + 1].position[(surface + 0) % 3] = x + 0 - offset;
                                        attrib[4 * index + 1].position[(surface + 1) % 3] = y + 1 - offset;
                                        attrib[4 * index + 1].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
-                                       attrib[4 * index + 1].tex_coord[0] = tex_u_end;
-                                       attrib[4 * index + 1].tex_coord[1] = 1.0f;
+                                       attrib[4 * index + 1].tex_coord[0] = 0.0f;
+                                       attrib[4 * index + 1].tex_coord[1] = tex_v_end;
                                        attrib[4 * index + 1].tex_coord[2] = tex;
 
                                        attrib[4 * index + 2].position[(surface + 0) % 3] = x + 1 - offset;
                                        attrib[4 * index + 2].position[(surface + 1) % 3] = y + 0 - offset;
                                        attrib[4 * index + 2].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
-                                       attrib[4 * index + 2].tex_coord[0] = tex_u_begin;
-                                       attrib[4 * index + 2].tex_coord[1] = 0.0f;
+                                       attrib[4 * index + 2].tex_coord[0] = 1.0f;
+                                       attrib[4 * index + 2].tex_coord[1] = tex_v_begin;
                                        attrib[4 * index + 2].tex_coord[2] = tex;
 
                                        attrib[4 * index + 3].position[(surface + 0) % 3] = x + 1 - offset;
                                        attrib[4 * index + 3].position[(surface + 1) % 3] = y + 1 - offset;
                                        attrib[4 * index + 3].position[(surface + 2) % 3] = surface < 3 ? offset : -offset;
-                                       attrib[4 * index + 3].tex_coord[0] = tex_u_end;
-                                       attrib[4 * index + 3].tex_coord[1] = 0.0f;
+                                       attrib[4 * index + 3].tex_coord[0] = 1.0f;
+                                       attrib[4 * index + 3].tex_coord[1] = tex_v_end;
                                        attrib[4 * index + 3].tex_coord[2] = tex;
                                }
                        }
@@ -421,8 +480,8 @@ void Planet::Draw(app::Assets &assets, graphics::Viewport &viewport) {
 
 
 void GenerateEarthlike(const Set<TileType> &tiles, Planet &p) noexcept {
-       rand::SimplexNoise elevation_gen(0);
-       rand::SimplexNoise variation_gen(45623752346);
+       math::SimplexNoise elevation_gen(0);
+       math::SimplexNoise variation_gen(45623752346);
 
        const int ice = tiles["ice"].id;
        const int ocean = tiles["ocean"].id;
@@ -460,7 +519,7 @@ void GenerateEarthlike(const Set<TileType> &tiles, Planet &p) noexcept {
                                        p.TileAt(surface, x, y).type = ice;
                                        continue;
                                }
-                               float elevation = rand::OctaveNoise(
+                               float elevation = math::OctaveNoise(
                                        elevation_gen,
                                        to_tile / p.Radius(),
                                        3,   // octaves
@@ -469,7 +528,7 @@ void GenerateEarthlike(const Set<TileType> &tiles, Planet &p) noexcept {
                                        2,   // amplitude
                                        2    // growth
                                );
-                               float variation = rand::OctaveNoise(
+                               float variation = math::OctaveNoise(
                                        variation_gen,
                                        to_tile / p.Radius(),
                                        3,   // octaves
@@ -561,5 +620,18 @@ std::vector<TileType::Yield>::const_iterator TileType::FindResource(int r) const
        return yield;
 }
 
+std::vector<TileType::Yield>::const_iterator TileType::FindBestResource(const creature::Composition &comp) const {
+       auto best = resources.cend();
+       double best_value = 0.0;
+       for (auto yield = resources.cbegin(); yield != resources.cend(); ++yield) {
+               double value = comp.Get(yield->resource);
+               if (value > best_value) {
+                       best = yield;
+                       best_value = value;
+               }
+       }
+       return best;
+}
+
 }
 }