start game physics

src/game.c

@@ -1,24 +1,31 @@
 #include "game.h"
 #include <SDL2/SDL_image.h>
 #include <SDL2/SDL_mixer.h>
+#include <SDL2/SDL_surface.h>
 #include "scaller.h"
 
+#define SPEED 1.f/10000000000
+#define GRAVITY 10000.f
+
 static RenderId_t menuObjects[10];
 static unsigned menuObjectsSize = 0;
 static Mix_Music * music;
 
 Scene_t gameScene;
 
-int game_staticRender(void){
-    MonitorSize_t size = renderer_getMonitorSize();
-    float aspectRatio = (float)size.width / size.height;
+static bool isSpaceKeypressed = false;
+static float deltaAccu = 0;
+static bool crashed = false;
+static const float startPersonPositionX = CAMERA_WIDTH * 0.23f;
+static const float startPersonPositionY = CAMERA_HEIGHT * 0.4f;
+static float personPositionX = startPersonPositionX;
+static float personPositionY = startPersonPositionY;
 
-    SDL_Surface* ppSurface = IMG_Load("./assets/img/pp.png");
-    if(ppSurface == NULL){
-        printf("cannot load background");
-        return -1;
-    }
+static const float personVelocityX = 200;
+static float personVelocityY = 0;
 
+
+static void playMusic(){
     music = Mix_LoadMUS("./assets/music/jojo arab.mp3");
 	if(music == NULL) {
 		fprintf(stderr, "Prout not found!\n");
@@ -29,23 +36,76 @@ int game_staticRender(void){
 		printf("Music sound could not be played!\n"
 			"SDL_Error: %s\n", Mix_GetError());
 		Mix_FreeMusic(music);
-		running = false;
+	    running = false;
 	}
+}
 
-    RenderObject_t pp;
-    strcpy(pp.name, "pp");
-    pp.z = 10;
-    pp.surface = ppSurface;
-    pp.width = 1;
-    pp.height = 1;
-    scaller(pp.surface, 1, &pp.width, &pp.height);
-    menuObjects[menuObjectsSize] = scene_addRenderObject(&gameScene, pp, CAMERA_WIDTH * 0.35f, 0);
+int game_staticRender(void){
+    playMusic();
+
+    MonitorSize_t size = renderer_getMonitorSize();
+    float aspectRatio = (float)size.width / size.height;
+
+    SDL_Surface* gameBackgroundSurface = IMG_Load("./assets/img/game_bg.png");
+    if(gameBackgroundSurface == NULL){
+        printf("cannot load background");
+        return -1;
+    }
+
+
+    RenderObject_t gameBackground;
+    strcpy(gameBackground.name, "gameBackground");
+    gameBackground.z = 0;
+    gameBackground.surface = gameBackgroundSurface;
+    scaller(gameBackground.surface, 1, &gameBackground.width, &gameBackground.height);
+    gameBackground.height = 1;
+    menuObjects[menuObjectsSize] = scene_addRenderObject(&gameScene, gameBackground, 0, 0);
     renderer_setScene(&gameScene);
     ++menuObjectsSize;
+
     return 0;
 }
 
 int game_render([[maybe_unused]] float delta){
+    for(unsigned i = 2; i < menuObjectsSize; ++i){
+        scene_removeRenderObject(&gameScene, menuObjects[i]);
+    }
+    menuObjectsSize = 2;
+
+    deltaAccu += delta;
+
+    SDL_Surface* buildingSurface = IMG_Load("./assets/img/building.png");
+    RenderObject_t building;
+    strcpy(building.name, "building");
+    building.z = 9;
+    building.surface = buildingSurface;
+    building.width = 0.25;
+    building.height = 1;
+    menuObjects[menuObjectsSize] = scene_addRenderObject(&gameScene, building, 0, 0);
+    ++menuObjectsSize;
+
+
+
+    SDL_Surface* personSurface = IMG_Load("./assets/img/person.png");
+    RenderObject_t person;
+    strcpy(person.name, "person");
+    person.z = 9;
+    person.surface = personSurface;
+    person.width = 0.25f;
+    scaller(person.surface, 0.05f, &person.width, &person.height);
+    // if(!crashed && deltaAccu >= SPEED && isSpaceKeypressed){
+    if(!crashed && isSpaceKeypressed){
+        personPositionX += personVelocityX * delta;
+        gameScene.x = personPositionX - startPersonPositionX;
+
+        personVelocityY += GRAVITY * delta;
+
+        personPositionY += personVelocityY * delta;
+        if(personPositionY + CAMERA_HEIGHT * person.height >= CAMERA_HEIGHT - 2) crashed = true;
+    }
+    menuObjects[menuObjectsSize] = scene_addRenderObject(&gameScene, person, personPositionX, personPositionY);
+    ++menuObjectsSize;
+
     return 0;
 }
 
@@ -54,3 +114,8 @@ void game_remove(void){
     Mix_FreeMusic(music);
     menuObjectsSize = 0;
 }
+
+
+void game_handleSpaceKeyInput(void){
+    isSpaceKeypressed = true;
+}

src/game.h

@@ -10,4 +10,6 @@ int game_render(float delta);
 
 void game_remove(void);
 
+void game_handleSpaceKeyInput(void);
+
 #endif

src/input.c

@@ -5,42 +5,80 @@
 #include <stdbool.h>
 
 
-keyEvent_t * events[SDL_NUM_SCANCODES];
-int event_counts[SDL_NUM_SCANCODES];
+keyEvent_t * eventsKeyDown[SDL_NUM_SCANCODES];
+int eventKeyDown_counts[SDL_NUM_SCANCODES];
+
+keyEvent_t * eventsKeyUp[SDL_NUM_SCANCODES];
+int eventKeyUp_counts[SDL_NUM_SCANCODES];
 
 void input_init(void) {
-    memset(events, 0, SDL_NUM_SCANCODES * sizeof(keyEvent_t *));
-    memset(event_counts, 0, SDL_NUM_SCANCODES * sizeof(int));
+    memset(eventsKeyDown, 0, SDL_NUM_SCANCODES * sizeof(keyEvent_t *));
+    memset(eventKeyDown_counts, 0, SDL_NUM_SCANCODES * sizeof(int));
+
+    memset(eventsKeyUp, 0, SDL_NUM_SCANCODES * sizeof(keyEvent_t *));
+    memset(eventKeyUp_counts, 0, SDL_NUM_SCANCODES * sizeof(int));
 }
 
-void input_poll(SDL_Scancode code) {
+void input_pollKeyDown(SDL_Scancode code) {
     printf("Scancode: %d\n", code);
-    keyEvent_t * handlers = events[code];
-    for(int i = 0; i < event_counts[code]; i++) {
+    keyEvent_t * handlers = eventsKeyDown[code];
+    for(int i = 0; i < eventKeyDown_counts[code]; i++) {
+        handlers[i]();
+    }
+}
+
+void input_pollKeyUp(SDL_Scancode code){
+    printf("Scancode: %d\n", code);
+    keyEvent_t * handlers = eventsKeyUp[code];
+    for(int i = 0; i < eventKeyUp_counts[code]; i++) {
         handlers[i]();
     }
 }
 
 
-void input_listen(SDL_Scancode code, keyEvent_t handler) {
-    event_counts[code]++;
-    events[code] = (keyEvent_t *)realloc(events[code], event_counts[code] * sizeof(keyEvent_t));
-    events[code][event_counts[code] - 1] = handler;
+void input_listenKeyDown(SDL_Scancode code, keyEvent_t handler) {
+    eventKeyDown_counts[code]++;
+    eventsKeyDown[code] = (keyEvent_t *)realloc(eventsKeyDown[code], eventKeyDown_counts[code] * sizeof(keyEvent_t));
+    eventsKeyDown[code][eventKeyDown_counts[code] - 1] = handler;
 }
 
-void input_removeListener(SDL_Scancode code, keyEvent_t handler) {
+void input_listenKeyUp(SDL_Scancode code, keyEvent_t handler) {
+    eventKeyUp_counts[code]++;
+    eventsKeyUp[code] = (keyEvent_t *)realloc(eventsKeyUp[code], eventKeyUp_counts[code] * sizeof(keyEvent_t));
+    eventsKeyUp[code][eventKeyUp_counts[code] - 1] = handler;
+}
+
+void input_removeKeyDownListener(SDL_Scancode code, keyEvent_t handler) {
     bool found = false;
-    for(int i = 0; i < event_counts[code]; i++) {
-        if(events[code][i] == handler) {
+    for(int i = 0; i < eventKeyDown_counts[code]; i++) {
+        if(eventsKeyDown[code][i] == handler) {
             found = true;
             break;
         }
         if(found) {
-            if(i == event_counts[code] - 1) {
+            if(i == eventKeyDown_counts[code] - 1) {
                 break;
             }
-            events[code][i] = events[code][i + 1];
+            eventsKeyDown[code][i] = eventsKeyDown[code][i + 1];
         }
     }
-    event_counts[code]--;
+    eventKeyDown_counts[code]--;
 }
+
+void input_removeKeyUpListener(SDL_Scancode code, keyEvent_t handler) {
+    bool found = false;
+    for(int i = 0; i < eventKeyUp_counts[code]; i++) {
+        if(eventsKeyUp[code][i] == handler) {
+            found = true;
+            break;
+        }
+        if(found) {
+            if(i == eventKeyUp_counts[code] - 1) {
+                break;
+            }
+            eventsKeyUp[code][i] = eventsKeyUp[code][i + 1];
+        }
+    }
+    eventKeyUp_counts[code]--;
+}
+

src/input.h

@@ -7,10 +7,14 @@ typedef void(*keyEvent_t)(void);
 
 //renderer facing
 void input_init(void);
-void input_poll(SDL_Scancode);
+void input_pollKeyDown(SDL_Scancode);
+void input_pollKeyUp(SDL_Scancode);
 
 //user facing
-void input_listen(SDL_Scancode code, keyEvent_t);
-void input_removeListener(SDL_Scancode code, keyEvent_t handler);
+void input_listenKeyDown(SDL_Scancode code, keyEvent_t);
+void input_removeKeyDownListener(SDL_Scancode code, keyEvent_t handler);
+
+void input_listenKeyUp(SDL_Scancode code, keyEvent_t);
+void input_removeKeyUpListener(SDL_Scancode code, keyEvent_t handler);
 
 #endif

src/main.c

@@ -28,6 +28,9 @@ static void space(void) {
 		game_staticRender();
 		renderer_setScene(&gameScene);
 	}
+	else {
+		game_handleSpaceKeyInput();
+	}
 }
 
 Scene_t demo;
@@ -41,7 +44,7 @@ static void game_setup(void) {
 		printf("error");
 		exit(1);
 	}
-	input_listen(SDL_SCANCODE_SPACE, space);
+	input_listenKeyDown(SDL_SCANCODE_SPACE, space);
 }
 
 static void game_loop(void) {

src/renderer.c

@@ -66,7 +66,10 @@ void renderer_main(void(*game_setup)(void), void(*game_loop)(void)) {
 
 			case SDL_KEYDOWN:
 				// keyboard API for key pressed
-				input_poll(event.key.keysym.scancode);
+				input_pollKeyDown(event.key.keysym.scancode);
+				break;
+			case SDL_KEYUP:
+				input_pollKeyUp(event.key.keysym.scancode);
 				break;
 			}
 		}