「ゲーム開発」中心が(0,0)の座標系で画面の左側から右に見て２００ピクセルの座標を算出する方法が知りたい

提示コードの///コメント部内部のコードですが中心が座標系(0,0)で画面の右から左に見て２００ピクセルの座標というのは算出できたのですが逆の左から右に見て２００ピクセルの座標はどういった計算式で算出できるのでしょうか？計算式が知りたいです。

cpp
1#include "../header/Player.hpp"
2
3#define SPEED (int)4;
4#define WEAPON_ANIMATION_SPEED ((int)10)
5#define WALK_ANIMATION_SPEED ((int)20)
6#define THROW_SPEED ((int)5)
7#define THROW_MOVE_SPEED ((int)150)
8#define THROW_DISTANCE ((int)300)
9Player::Player() : Actor()
10{
11    position = glm::ivec2(0,0);
12    throwPosition = glm::ivec2(0,0);
13    throwDistance = 0;
14    speed = SPEED;
15    moveVector = glm::vec2(1,0);
16
17    up_sprite = FrameWork::LoadTexture("Asset/texture/up.png"); 
18    down_sprite = FrameWork::LoadTexture("Asset/texture/down.png"); 
19    left_sprite = FrameWork::LoadTexture("Asset/texture/left.png"); 
20    right_sprite = FrameWork::LoadTexture("Asset/texture/right.png"); 
21
22    sword_right_sprite[0] = FrameWork::LoadTexture("Asset/texture/sword_right_0.png");
23    sword_right_sprite[1] = FrameWork::LoadTexture("Asset/texture/sword_right_1.png");
24    sword_right_sprite[2] = FrameWork::LoadTexture("Asset/texture/sword_right_2.png");
25    sword_right_sprite[3] = FrameWork::LoadTexture("Asset/texture/sword_right_3.png");
26
27    sword_left_sprite[0] = FrameWork::LoadTexture("Asset/texture/sword_left_0.png");
28    sword_left_sprite[1] = FrameWork::LoadTexture("Asset/texture/sword_left_1.png");
29    sword_left_sprite[2] = FrameWork::LoadTexture("Asset/texture/sword_left_2.png");
30    sword_left_sprite[3] = FrameWork::LoadTexture("Asset/texture/sword_left_3.png");
31
32    sword_up_sprite[0] = FrameWork::LoadTexture("Asset/texture/sword_up_0.png");
33    sword_up_sprite[1] = FrameWork::LoadTexture("Asset/texture/sword_up_1.png");
34    sword_up_sprite[2] = FrameWork::LoadTexture("Asset/texture/sword_up_2.png");
35    sword_up_sprite[3] = FrameWork::LoadTexture("Asset/texture/sword_up_3.png");
36
37    sword_down_sprite[0] = FrameWork::LoadTexture("Asset/texture/sword_down_0.png");
38    sword_down_sprite[1] = FrameWork::LoadTexture("Asset/texture/sword_down_1.png");
39    sword_down_sprite[2] = FrameWork::LoadTexture("Asset/texture/sword_down_2.png");
40    sword_down_sprite[3] = FrameWork::LoadTexture("Asset/texture/sword_down_3.png");
41
42    weapon_right_sprite = FrameWork::LoadTexture("Asset/texture/sword_right.png");
43    weapon_left_sprite = FrameWork::LoadTexture("Asset/texture/sword_left.png");
44    weapon_up_sprite = FrameWork::LoadTexture("Asset/texture/sword_up.png");
45    weapon_down_sprite = FrameWork::LoadTexture("Asset/texture/sword_down.png");
46
47
48    isThrow = false;
49
50    state = State::Wait;
51
52    cameraPosition;
53
54
55    animation_Attack_Time = 0;
56    animation_Attack_Clip = 1;
57
58    animation_Time = 0;
59    animation = false;
60    isMove = false;
61    isAttack = false;
62}
63
64void Player::setCamera(std::shared_ptr<FrameWork::Camera> c)
65{
66    camera = c;
67    cameraPosition = camera->getPosition();
68}
69
70
71void Player::Update()
72{
73
74
75
76    if ((state != State::Attack) && (state != State::Shift))
77    {
78        speed = SPEED;
79
80        if(FrameWork::GetKeyInput(GLFW_KEY_UP) > 0)
81        {
82            moveVector.y = 1;
83            moveVector.x = 0;
84
85            if(state == State::Wait)
86            {
87                animation = true;
88            }
89            state = State::Walk;
90        }
91        else if(FrameWork::GetKeyInput(GLFW_KEY_DOWN) > 0)
92        {
93
94
95            moveVector.x = 0;
96            moveVector.y = -1;
97
98            if(state == State::Wait)
99            {
100                animation = true;
101            }
102            
103            state = State::Walk;
104
105        }
106        else if(FrameWork::GetKeyInput(GLFW_KEY_LEFT) > 0)
107        {
108            moveVector.y = 0;
109            moveVector.x = -1;
110
111            if(state == State::Wait)
112            {
113                animation = true;
114            }
115            state = State::Walk;
116        
117        } 
118        else if(FrameWork::GetKeyInput(GLFW_KEY_RIGHT) > 0)
119        {
120            moveVector.y = 0;
121            moveVector.x = 1;
122
123
124            if(state == State::Wait)
125            {
126                animation = true;
127            }
128            state = State::Walk;
129            
130        }
131        else 
132        {
133            speed = 0;
134            state = State::Wait;
135
136        }
137        
138    }
139
140
141    if(FrameWork::GetKeyInput(GLFW_KEY_SPACE) == 1)
142    {
143        state = State::Attack;
144        speed = 0;
145
146    }
147    else if(FrameWork::GetKeyInput(GLFW_KEY_LEFT_SHIFT) == 1)
148    {
149        state = State::Shift;
150        speed = 0;
151
152    }
153    
154
155
156    
157
158
159    //cameraPosition.x += 1;
160    //printf("x %d\n",cameraPosition.x);
161
162    
163    //歩行アニメーション
164    if(state == State::Walk)
165    {
166        animation_Time += FrameWork::GetDeltaTime();
167        if(animation_Time > WALK_ANIMATION_SPEED)
168        {
169            animation_Time = 0;
170            animation = !animation;
171        }
172    }
173
174
175
176        //攻撃アニメーション
177    if( state == State::Attack)
178    {
179        animation_Attack_Time += FrameWork::GetDeltaTime();
180        if(animation_Attack_Time > WEAPON_ANIMATION_SPEED)
181        {
182            animation_Attack_Time = 0;
183
184            animation_Attack_Clip += 1;
185            if(animation_Attack_Clip > 3 )
186            {
187                animation_Attack_Clip  = 0;
188
189                state = State::Wait;                
190            }
191        }
192    }
193
194
195
196    //攻撃アニメーション
197    if( (state == State::Shift) && (isThrow == false) )
198    {
199        animation_Attack_Time += FrameWork::GetDeltaTime();
200        if(animation_Attack_Time > WEAPON_ANIMATION_SPEED)
201        {
202            animation_Attack_Time = 0;
203
204            animation_Attack_Clip += 1;
205            if(animation_Attack_Clip > 3 )
206            {
207                animation_Attack_Clip  = 0;
208                
209                
210                //武器を飛ばすときの初期座標
211                if(moveVector.x > 0)
212                {
213                    throwPosition = position + glm::ivec2(20,-3);   
214                }
215                else if(moveVector.x < 0)
216                {
217                    throwPosition = position + glm::ivec2(-20,-3);  
218                }
219                else if(moveVector.y > 0)
220                {
221                    throwPosition = position + glm::ivec2(-3,32);   
222                }
223                else if(moveVector.y < 0)
224                {
225                    throwPosition = position + glm::ivec2(1,-32);  
226                }
227
228
229                isThrow = true;
230            }
231        }
232    }
233
234
235    //武器を飛ばす
236    if(isThrow == true)
237    {
238        
239        if(throwDistance > THROW_DISTANCE)
240        {
241
242            if(moveVector.x > 0)
243            {
244                position.x += THROW_MOVE_SPEED;
245                if(throwPosition.x < position.x)
246                {
247                    position.x = throwPosition.x;
248                    cameraPosition.x = position.x;
249
250                    throwDistance = 0;
251                    isThrow = false;
252                    state = State::Wait;
253
254                }
255            }
256            else if(moveVector.x < 0)
257            {    
258                position.x += -THROW_MOVE_SPEED;
259                if(throwPosition.x > position.x)
260                {
261                    position.x = throwPosition.x;
262                    throwDistance = 0;
263                    isThrow = false;
264                    state = State::Wait;
265
266                }
267            }
268            else if(moveVector.y > 0)
269            {
270                position.y += THROW_MOVE_SPEED;
271                if(throwPosition.y < position.y)
272                {
273                    throwPosition.y = position.y;
274
275                    throwDistance = 0;
276                    isThrow = false;
277                    state = State::Wait;
278
279                }
280            }
281            else if(moveVector.y < 0)
282            {            
283                position.y += -THROW_MOVE_SPEED;
284                if(throwPosition.y > position.y)
285                {
286                    throwPosition.y = position.y;
287
288                    throwDistance = 0;
289                    isThrow = false;
290                    state = State::Wait;
291
292                }
293            }
294        }
295        else
296        {
297            throwPosition += moveVector * (float)THROW_SPEED * FrameWork::GetDeltaTime();
298            throwDistance += (float)THROW_SPEED * FrameWork::GetDeltaTime();
299
300        }
301
302    }
303
304
305//    printf("x: %d\n",(int)FrameWork::GetWindowSize().x);
306//    printf("y: %d\n",(int)FrameWork::GetWindowSize().y);
307//    printf("player x: %d\n",(int)position.x);
308//    printf("player y: %d\n\n",(int)position.y);
309
310printf("x %d\n",((float)camera->getPosition().x) );                                                                                 
311
312    if((camera->getPosition().x + 200) < position.x)
313    {
314        printf("right\n");
315        if(state == State::Walk)
316        {
317            cameraPosition.x += speed;
318            speed = 0;
319        }
320        else if(state == State::Shift)
321        {
322            cameraPosition.x += THROW_MOVE_SPEED;
323        }
324
325
326    }
327    ////////////////////////////////////////////////////////////////////////////////////////
328    else if(camera->getPosition().x - 200 > position.x)
329    /////////////////////////////////////////////////////////////////////////////////////////
330    {
331        printf("left\n");
332        cameraPosition.x += -speed;
333        speed = 0;
334    }
335
336    camera->setPosition(glm::ivec3(cameraPosition,1));    
337
338    position += moveVector * (float)FrameWork::GetDeltaTime() * speed;
339
340//    printf("x: %f\n",(moveVector * (float)FrameWork::GetDeltaTime() * speed).x);
341//    printf("y: %f\n\n",(moveVector * (float)FrameWork::GetDeltaTime() * speed).y);
342
343
344}
345void Player::Renderer(const glm::mat4 view)const
346{
347
348}
349
350Player::~Player()
351{
352    
353}
354

vann_2921

2022/02/06 09:21

「画面の右から左に見て２００ピクセル」が何基準なのか(原点?, 画面端?)分からないので修正してください。もし、中心からの座標ということであれば+Xが画面右方向の座標系なら-が左方向です。右端(左端)からの距離ということであれば中心から右端(左端)までの距離が必要になると思います。 camera->getPosition().x - 200 > position.x には具体的にどんな数字が入りますか？