Merge pull request #7 from CrystalPointA4/enemy

Enemy collision and tracking

CrystalJohan.cpp

@@ -42,7 +42,7 @@ void CrystalJohan::draw()
 	glMatrixMode(GL_MODELVIEW);
 	glLoadIdentity();
 
-	glDisable(GL_LIGHTING);
+	/*glDisable(GL_LIGHTING);
 	glDisable(GL_DEPTH_TEST);
 	glColor4f(1, cos(glutGet(GLUT_ELAPSED_TIME) / 1000.0f), sin(glutGet(GLUT_ELAPSED_TIME) / 1000.0f), 1);
 	glBegin(GL_TRIANGLES);
@@ -50,7 +50,7 @@ void CrystalJohan::draw()
 	glVertex2f(mousePosition.x+15, mousePosition.y+15);
 	glVertex2f(mousePosition.x+5, mousePosition.y+20);
 
-	glEnd();
+	glEnd();*/
 
 	glutSwapBuffers();
 }
@@ -86,6 +86,7 @@ void CrystalJohan::update()
 	if (!world->isPlayerPositionValid())
 		world->player.position = oldPosition;
 
+	world->update(deltaTime);
 
 	mousePosition = mousePosition + mouseOffset;
 

CrystalJohan.vcxproj

@@ -182,6 +182,9 @@
     <ClInclude Include="Vertex.h" />
     <ClInclude Include="World.h" />
   </ItemGroup>
+  <ItemGroup>
+    <None Include="worlds\world1.json" />
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>

CrystalJohan.vcxproj.filters

@@ -99,4 +99,7 @@
       <Filter>Header Files</Filter>
     </ClInclude>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="worlds\world1.json" />
+  </ItemGroup>
 </Project>

Enemy.cpp

@@ -1,12 +1,76 @@
+#define _USE_MATH_DEFINES
+#include <cmath>
+
 #include "Enemy.h"
+#include "Model.h"
+#include <iostream>
 
 
-
-Enemy::Enemy()
+Enemy::Enemy(const std::string &fileName,
+	const Vec3f &position,
+	Vec3f &rotation,
+	const float &scale,
+	const bool &hasCollision)
 {
+	model = Model::load(fileName);
+	this->position = position;
+	this->rotation = rotation;
+	this->scale = scale;
+	this->canCollide = hasCollision;
+	target = position;
+	speed = 1;
+	radius = 10;
+	hasTarget = false;
 }
 
 
 Enemy::~Enemy()
 {
+	if (model)
+		Model::unload(model);
+}
+
+void Enemy::draw()
+{
+	Entity::draw();
+	glPushMatrix();
+	
+	glTranslatef(position.x, position.y, position.z);
+
+	glBegin(GL_LINE_LOOP);
+	for (int i = 0; i < 360; i++)
+	{
+		//convert degrees into radians
+		float degInRad = i*(M_PI / 180.0);
+		glVertex3f(cos(degInRad)*radius, 1*scale,sin(degInRad)*radius);
+	}
+	glEnd();
+
+	glPopMatrix();
+}
+
+void Enemy::update(float delta)
+{
+	if (hasTarget)
+	{
+		//just 2d walking
+		float dx, dz, length;
+
+		dx = target.x - position.x;
+		dz = target.z - position.z;
+
+		length = sqrt(dx*dx + dz*dz);
+		if (length > 0.03)
+		{
+			dx /= length;
+			dz /= length;
+
+			dx *= speed*delta;
+			dz *= speed*delta;
+
+			position.x += dx;
+			position.z += dz;
+		}
+		rotation.y = atan2f(dx, dz) * 180 / M_PI;		
+	}	
 }

Enemy.h

@@ -1,8 +1,20 @@
 #pragma once
-class Enemy
+
+#include "Entity.h"
+#include <string>
+#include "Vector.h"
+
+class Enemy : public Entity
 {
 public:
-	Enemy();
+	Enemy(const std::string &fileName,const Vec3f &position,Vec3f &rotation,const float &scale,const bool &hasCollision);
 	~Enemy();
+
+	bool hasTarget;
+	Vec3f target;
+	float speed,radius;
+
+	void update(float);
+	void draw();
 };
 

Entity.cpp

@@ -29,7 +29,13 @@ void Entity::draw()
 		glRotatef(rotation.z, 0, 0, 1);
 		glScalef(scale, scale, scale);
 
+		glEnable(GL_CULL_FACE);
+		glCullFace(GL_BACK);
 		model->draw();
+		glCullFace(GL_FRONT);
+		model->draw();
+		glDisable(GL_CULL_FACE);
+
 		glPopMatrix();
 	}
 

LevelObject.h

@@ -7,7 +7,11 @@
 class LevelObject : public Entity
 {
 public:
-	LevelObject(const std::string &fileName, const Vec3f &position, const Vec3f &rotation, const float &scale, const bool &hasCollision);
+	LevelObject(const std::string &fileName, 
+		const Vec3f &position, 
+		const Vec3f &rotation, 
+		const float &scale, 
+		const bool &hasCollision);
 	~LevelObject();
 };
 

Model.cpp

@@ -306,6 +306,9 @@ Model::Texture::Texture(const std::string & fileName)
 		imgData);		//data
 	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+
 	stbi_image_free(imgData);
 }
 

Player.cpp

@@ -18,11 +18,12 @@ void Player::setCamera()
 
 void Player::setPosition(float angle, float fac, bool height)
 {
+	fac *= speed;
 	if (height)
 		position.y += angle*fac;
 	else
 	{
-		position.x -= (float)cos((rotation.y + angle) / 180 * M_PI) * fac*speed;
-		position.z -= (float)sin((rotation.y + angle) / 180 * M_PI) * fac*speed;
+		position.x -= (float)cos((rotation.y + angle) / 180 * M_PI) * fac;
+		position.z -= (float)sin((rotation.y + angle) / 180 * M_PI) * fac;
 	}
 }

Vector.cpp

@@ -1,3 +1,5 @@
+#define _USE_MATH_DEFINES
+#include <cmath>
 #include "Vector.h"
 
 Vec3f::Vec3f(float x, float y, float z)
@@ -6,6 +8,29 @@ Vec3f::Vec3f(float x, float y, float z)
 	this->y = y;
 	this->z = z;
 }
+/*The length of the vector*/
+float Vec3f::Length()
+{
+	return (float)sqrt(x*x+y*y+z*z);
+}
+
+void Vec3f::Normalize()
+{	
+	float length = this->Length();
+
+	if (length != 0)
+	{
+		x = x / length;
+		y = y / length;
+		z = z / length;
+	}
+}
+
+float Vec3f::Distance(const Vec3f &other)
+{
+	return (float)sqrt(pow(other.x - x, 2)+pow(other.y - y, 2)+pow(other.z - z, 2));
+}
+
 Vec3f::Vec3f()
 {
 	this->x = 0;
@@ -29,11 +54,32 @@ Vec3f Vec3f::operator+(const Vec3f & other)
 	return Vec3f(x + other.x, y + other.y, z + other.z);
 }
 
+Vec3f Vec3f::operator-(const Vec3f & other)
+{
+	return Vec3f(x - other.x, y - other.y, z - other.z);
+}
+
 Vec3f Vec3f::operator/(float value)
 {
 	return Vec3f(x / value, y / value, z / value);
 }
 
+bool  Vec3f::operator==(const Vec3f & other)
+{
+	/*bool xb, yb,zb;
+	xb = x == other.x;
+	yb = y == other.y;
+	zb = z == other.z;
+	if (xb & yb & zb)
+		return true;*/
+	return x == other.x & y == other.y & z == other.z;
+}
+
+bool Vec3f::operator!=(const Vec3f & other)
+{
+	return x != other.x & y != other.y & z != other.z;
+}
+
 
 
 Vec2f::Vec2f(float x, float y)
@@ -61,3 +107,9 @@ Vec2f Vec2f::operator+(const Vec2f & other)
 {
 	return Vec2f(x + other.x, y+other.y);
 }
+
+float Vec2f::length()
+{
+	return (float)sqrt(x*x + y*y);
+}
+

Vector.h

@@ -14,9 +14,15 @@ public:
 	Vec3f();
 	Vec3f(const Vec3f &other);
 	Vec3f(float x, float y, float z);
+	float Length();
+	void Normalize();
+	float Distance(const Vec3f &);
 	float& operator [](int);
 	Vec3f operator + (const Vec3f &other);
+	Vec3f operator -(const Vec3f &other);
 	Vec3f operator / (float value);
+	bool operator ==(const Vec3f &other);
+	bool operator !=(const Vec3f &other);
 };
 
 class Vec2f
@@ -35,5 +41,6 @@ public:
 	Vec2f(const Vec2f &other);
 	float& operator [](int);
 	Vec2f operator + (const Vec2f &other);
+	float length();	
 };
 

World.cpp

@@ -8,6 +8,7 @@
 
 World::World() : player(Player::getInstance())
 {
+
 	std::ifstream file("worlds/world1.json");
 	if(!file.is_open())
 		std::cout<<"Uhoh, can't open file\n";
@@ -22,6 +23,7 @@ World::World() : player(Player::getInstance())
 	player.position.y = v["player"]["startposition"][1];
 	player.position.z = v["player"]["startposition"][2];
 
+
 	for (auto object : v["objects"])
 	{
 		bool hasCollision = true;
@@ -39,6 +41,49 @@ World::World() : player(Player::getInstance())
 		Vec3f position(object["pos"][0], object["pos"][1], object["pos"][2]);
 		entities.push_back(new LevelObject(object["file"], position, rotation, scale, hasCollision));
 	}
+
+	//look up table for the enemies	
+	std::vector<std::pair<int, std::string>>enemy_models;
+	for (auto enemy_model : v["enemy_models"])
+	{		
+		int id = -1;
+		if (!enemy_model["id"].isNull())
+			id = enemy_model["id"].asInt();
+
+		std::string fileName = "";
+		if (!enemy_model["file"].isNull())
+			fileName = enemy_model["file"].asString();
+
+		enemy_models.push_back(std::pair<int, std::string>(id,fileName));
+	}
+
+	for (auto enemy : v["enemy_data"])
+	{
+		int id = -1;
+		if (!enemy["id"].isNull())
+			id = enemy["id"];
+		for (auto enemy_model : enemy_models)
+		{
+			if (id == enemy_model.first)
+			{				
+				Vec3f position(0, 0, 0);
+				if (!enemy["pos"].isNull())
+					position = Vec3f(enemy["pos"][0], enemy["pos"][1], enemy["pos"][2]);
+
+				Vec3f rotation(0, 0, 0);
+				if (!enemy["rot"].isNull())
+					rotation = Vec3f(enemy["rot"][0], enemy["rot"][1], enemy["rot"][2]);
+
+				float scale = 1.0f;
+				if (!enemy["scale"].isNull())
+					scale = enemy["scale"].asFloat();
+				
+				enemies.push_back(new Enemy(enemy_model.second,position,rotation,scale,true));
+			}
+
+		}
+		
+	}
 }
 
 
@@ -58,15 +103,46 @@ void World::draw()
 	glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
 	heightmap->Draw();
 
-	for (auto e : entities)
-		e->draw();
+	for (auto &enemy : enemies)
+		enemy->draw();
+
+	for (auto &entity : entities)
+		entity->draw();
+
+	
 
 }
 
 void World::update(float elapsedTime)
 {
-	for (auto e : entities)
-		e->update(elapsedTime);
+	for (auto &entity : entities)
+		entity->update(elapsedTime);
+
+	for (auto &enemy : enemies)
+	{
+		if (enemy->position.Distance(player.position) <= enemy->radius)
+		{			
+			enemy->hasTarget = true;
+			enemy->target.x = player.position.x;
+			enemy->target.z = player.position.z;
+		}
+		else
+			enemy->hasTarget = false;
+
+		Vec3f oldpos = enemy->position;
+		enemy->update(elapsedTime);
+		if (enemy->hasTarget)
+		{
+			for (auto e : entities)
+			{
+				if (e->canCollide && e->inObject(enemy->position))
+				{
+					enemy->position = oldpos;
+					break;
+				}
+			}
+		}		
+	}
 }
 
 bool World::isPlayerPositionValid()

World.h

@@ -3,6 +3,7 @@
 #include <vector>
 #include "HeightMap.h"
 #include "Player.h"
+#include "Enemy.h"
 
 class Entity;
 
@@ -15,6 +16,9 @@ public:
 
 	Player& player;
 	std::vector<Entity*> entities;
+
+	std::vector<Enemy*> enemies;
+
 	HeightMap* heightmap;
 
 	void draw();

models/Teleporter/Teleporter.mtl

@@ -0,0 +1,19 @@
+newmtl CylinderSG
+illum 4
+Kd 0.00 0.00 0.00
+Ka 0.00 0.00 0.00
+Tf 1.00 1.00 1.00
+map_Kd ^D70CEF585F0EAF59BA1D4FC14B4011137E15ED44D07FA7B93F^pimgpsh_fullsize_distr.png
+Ni 1.00
+newmtl Oil_TankSG
+illum 4
+Kd 0.00 0.00 0.80
+Ka 0.00 0.00 0.00
+Tf 1.00 1.00 1.00
+Ni 1.00
+newmtl Oil_TankSG1
+illum 4
+Kd 0.43 0.63 0.80
+Ka 0.00 0.00 0.00
+Tf 1.00 1.00 1.00
+Ni 1.00

models/squid/Blooper.mtl

@@ -0,0 +1,9 @@
+# Created by Every File Explorer
+
+newmtl GessoMat00
+Ka 1 1 1
+Kd 1 1 1
+Ks 0.05098039 0.05098039 0.05098039
+d 1
+map_Kd enemy_xx01_Gesso_dif.png
+

worlds/world1.json

@@ -9,11 +9,25 @@
   "objects": [
     {
       "file": "models/boom/Boom.obj",
-      "pos": [ 0, 0, -4 ]
+      "pos": [ 4, 0, -4 ]
     },
     {
-      "file": "models/boom/Boom.obj",
-      "pos": [ 4, 0, -4 ]
+      "file": "models/Teleporter/Teleporter.obj",
+      "pos": [ 0, 0, -4 ],
+      "rot": [ 0, 0, 0 ]
     }
+  ],
+  "enemy_models": [
+    {
+      "id": 0,
+      "file": "models/squid/Blooper.obj"
+    }
+  ],
+  "enemy_data": [
+    {
+      "id": 0,
+      "pos": [ 1, 2, -10 ],
+      "scale": 0.01
+    }   
   ]
 }