Generalise the physics a bit

Makefile (SFConflict mail@alistairmichael.com 2019-08-01-11-07-48)

@@ -0,0 +1,30 @@
+CXX = gcc
+SDL_INCLUDE = -lSDL2 -lSDL2_image 
+CXXFLAGS = $(SDL_INCLUDE)
+EXE = main 
+
+default: all
+
+run: all
+	./$(EXE)
+
+all: $(EXE)
+
+$(EXE): main.o logger.o game.o
+	$(CXX) $(CXXFLAGS) -o $(EXE)  main.o game.o logger.o 
+
+main.o: main.c logger.h game.h
+	$(CXX) $(CXXFLAGS) -c main.c  
+
+logger.o: logger.c logger.h
+	$(CXX) $(CXXFLAGS) -c logger.c   
+
+game.o: game.c game.h
+	$(CXX) $(CXXFLAGS) -c game.c   
+
+clean:
+
+	rm *.o && rm $(EXE)
+
+
+

game.c

@@ -75,6 +75,18 @@ void set_motor_ms(physics_thing * thing, float x, float y) {
     logwrite(DEBUG, "set motor thing\n");
 }
 
+void add_motor_ms(physics_thing * thing, float x, float y) {
+    // set motor force in newtons
+
+    float  x_adj = x;
+    float  y_adj = y;
+
+    (*thing).motor_x += (float)y_adj;
+    (*thing).motor_y += (float)x_adj;
+
+    logwrite(DEBUG, "set motor thing\n");
+}
+
 
 int advance_glob(physics_thing * thing) {
     logwrite(DEBUG, "Global physics\n");
@@ -185,7 +197,7 @@ void add_to_world(world_thing thing) {
 void startgame(SDL_Renderer * ren) {
     things_in_world = 0;
 
-    player = get_player(100,300);
+    player = get_player(100,400);
 
     world_thing player_world;
 
@@ -215,7 +227,7 @@ void walk_player(int x, int y) {
     
     //set_motor_ms(&player.physics, player.max_walking_speed * 0.01 * x, player.max_walking_speed * 0.01 * y);
 
-    set_motor_ms(&player.physics, 100 * y , 100 * x);
+    add_motor_ms(&player.physics, 100 * y , 100 * x);
     
 //        player.physics.x_acc = player.max_walking_speed * 0.00001 * x ;
 //        player.physics.y_acc = player.max_walking_speed * 0.00001 * y ;
@@ -266,7 +278,8 @@ void step(int interval) {
 //    player.physics.y_acc = 0;
 
     keyboard = SDL_GetKeyboardState(NULL);
-    walk_player(0,0);
+
+    set_motor_ms(&player.physics, 0 ,0);
     if (keyboard[SDL_SCANCODE_W]) {
         walk_player(0, -1);
     } if (keyboard[SDL_SCANCODE_A]) {