X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fai%2Fai.cpp;h=7dfe0424c44a210cdf1f1619063a2d756da45f64;hb=4da2ae6f12d7cf4594edb2d560c5c112e9bcd094;hp=b3e1a0ceae5fb852c2f8fd653bfa2675cd193022;hpb=c52405fad9c070e1370f852234c6eb723b52916c;p=blank.git

diff --git a/src/ai/ai.cpp b/src/ai/ai.cpp
index b3e1a0c..7dfe042 100644
--- a/src/ai/ai.cpp
+++ b/src/ai/ai.cpp
@@ -2,53 +2,84 @@
 #include "Controller.hpp"
 #include "RandomWalk.hpp"
 
+#include "../model/geometry.hpp"
 #include "../world/Entity.hpp"
+#include "../world/World.hpp"
+#include "../world/WorldCollision.hpp"
 
 #include <glm/glm.hpp>
 
 
 namespace blank {
 
-Chaser::Chaser(Entity &ctrl, Entity &tgt) noexcept
+Chaser::Chaser(World &world, Entity &ctrl, Entity &tgt) noexcept
 : Controller(ctrl)
+, world(world)
 , tgt(tgt)
-, speed(0.002f)
-, stop_dist(5 * 5)
-, flee_dist(3 * 3) {
-
+, chase_speed(2.0f)
+, flee_speed(-5.0f)
+, stop_dist(10)
+, flee_dist(5) {
+	tgt.Ref();
 }
 
 Chaser::~Chaser() {
-
+	tgt.UnRef();
 }
 
 void Chaser::Update(int dt) {
+	if (Target().Dead()) {
+		Controlled().Kill();
+		return;
+	}
+
 	glm::vec3 diff(Target().AbsoluteDifference(Controlled()));
-	float dist = dot (diff, diff);
-	// TODO: line of sight test
-	if (dist > stop_dist) {
-		Controlled().Velocity(normalize(diff) * speed);
+	float dist = length(diff);
+	if (dist < std::numeric_limits<float>::epsilon()) {
+		Controlled().TargetVelocity(glm::vec3(0.0f));
+		return;
+	}
+	glm::vec3 norm_diff(diff / dist);
+
+	bool line_of_sight = true;
+	Ray aim{Target().Position() - diff, norm_diff};
+	WorldCollision coll;
+	if (world.Intersection(aim, glm::mat4(1.0f), Target().ChunkCoords(), coll)) {
+		line_of_sight = coll.depth > dist;
+	}
+
+	if (!line_of_sight) {
+		Controlled().TargetVelocity(glm::vec3(0.0f));
+	} else if (dist > stop_dist) {
+		Controlled().TargetVelocity(norm_diff * chase_speed);
 	} else if (dist < flee_dist) {
-		Controlled().Velocity(normalize(diff) * -speed);
+		Controlled().TargetVelocity(norm_diff * flee_speed);
 	} else {
-		Controlled().Velocity(glm::vec3(0.0f));
+		Controlled().TargetVelocity(glm::vec3(0.0f));
 	}
 }
 
 
 Controller::Controller(Entity &e) noexcept
 : entity(e) {
-
+	entity.Ref();
 }
 
 Controller::~Controller() {
-
+	entity.UnRef();
 }
 
 
-RandomWalk::RandomWalk(Entity &e) noexcept
+RandomWalk::RandomWalk(Entity &e, std::uint64_t seed) noexcept
 : Controller(e)
-, time_left(0) {
+, random(seed)
+, start_vel(e.Velocity())
+, target_vel(start_vel)
+, start_rot(e.AngularVelocity())
+, target_rot(start_rot)
+, switch_time(0)
+, lerp_max(1.0f)
+, lerp_time(0.0f) {
 
 }
 
@@ -57,45 +88,36 @@ RandomWalk::~RandomWalk() {
 }
 
 void RandomWalk::Update(int dt) {
-	time_left -= dt;
-	if (time_left > 0) return;
-	time_left += 2500 + (rand() % 5000);
-
-	constexpr float move_vel = 0.0005f;
-
-	glm::vec3 new_vel = Controlled().Velocity();
-
-	switch (rand() % 9) {
-		case 0:
-			new_vel.x = -move_vel;
-			break;
-		case 1:
-			new_vel.x = 0.0f;
-			break;
-		case 2:
-			new_vel.x = move_vel;
-			break;
-		case 3:
-			new_vel.y = -move_vel;
-			break;
-		case 4:
-			new_vel.y = 0.0f;
-			break;
-		case 5:
-			new_vel.y = move_vel;
-			break;
-		case 6:
-			new_vel.z = -move_vel;
-			break;
-		case 7:
-			new_vel.z = 0.0f;
-			break;
-		case 8:
-			new_vel.z = move_vel;
-			break;
+	switch_time -= dt;
+	lerp_time -= dt;
+	if (switch_time < 0) {
+		switch_time += 2500 + (random.Next<unsigned short>() % 5000);
+		lerp_max = 1500 + (random.Next<unsigned short>() % 1000);
+		lerp_time = lerp_max;
+		Change();
+	} else if (lerp_time > 0) {
+		float a = std::min(lerp_time / lerp_max, 1.0f);
+		Controlled().TargetVelocity(mix(target_vel, start_vel, a));
+		Controlled().AngularVelocity(mix(target_rot, start_rot, a));
+	} else {
+		Controlled().TargetVelocity(target_vel);
+		Controlled().AngularVelocity(target_rot);
 	}
+}
+
+void RandomWalk::Change() noexcept {
+	start_vel = target_vel;
+	start_rot = target_rot;
+
+	constexpr float base = 0.001f;
+
+	target_vel.x = base * (random.Next<short>() % 1024);
+	target_vel.y = base * (random.Next<short>() % 1024);
+	target_vel.z = base * (random.Next<short>() % 1024);
 
-	Controlled().Velocity(new_vel);
+	target_rot.x = base * (random.Next<short>() % 1024);
+	target_rot.y = base * (random.Next<short>() % 1024);
+	target_rot.z = base * (random.Next<short>() % 1024);
 }
 
 }