Implement touch controls

src/camera/CMakeLists.txt

@@ -1,3 +1,3 @@
-add_library(camera "src/camera.c" "src/pad.c" "src/mouse.c")
+add_library(camera "src/camera.c" "src/pad.c" "src/mouse.c" "src/touch.c")
 target_include_directories(camera PUBLIC "inc" PRIVATE "privinc")
 target_link_libraries(camera PUBLIC container mouse pad terrain util PRIVATE gfx)

src/camera/inc/camera.h

@@ -35,6 +35,7 @@ extern struct sprite cursor_sprite;
 
 void camera_update_pad(struct camera *cam, const struct pad *p);
 void camera_update_mouse(struct camera *cam, const struct mouse *m);
+bool camera_update_touch(struct camera *cam, const struct mouse *m);
 bool camera_translate(const struct camera *cam, const struct util_rect *dim, short *x, short *y);
 void cursor_init(struct cursor *c);
 bool cursor_collision(const struct camera *cam, const struct util_rect *d);

src/camera/src/touch.c

@@ -0,0 +1,57 @@
+#include <camera.h>
+#include <mouse.h>
+#include <camera_private.h>
+#include <gfx.h>
+
+static void cursor_update(struct cursor *const c, const struct mouse *const m)
+{
+    if (c->screen.last_w != screen_w
+        || c->screen.last_h != screen_h)
+        cursor_init(c);
+
+    c->x = m->x;
+    c->y = m->y;
+}
+
+static bool update_speed(struct camera *const cam, const struct mouse *const m)
+{
+    bool ret = false;
+    int *const sx = &cam->x_speed, *const sy = &cam->y_speed;
+
+    if (mouse_pressed(m, MOUSE_BUTTON_LEFT))
+    {
+        *sx = m->dx;
+        *sy = m->dy;
+
+        ret = *sx || *sy;
+    }
+    else if (*sx || *sy)
+    {
+        const int qx = *sx / 4;
+
+        if (qx)
+            *sx -= qx;
+        else
+            *sx = 0;
+
+        const int qy = *sy / 4;
+
+        if (qy)
+            *sy -= qy;
+        else
+            *sy = 0;
+    }
+
+    return ret;
+}
+
+bool camera_update_touch(struct camera *const cam, const struct mouse *const m)
+{
+    bool ret;
+
+    cursor_update(&cam->cursor, m);
+    ret = update_speed(cam, m);
+    camera_update_pos(cam);
+
+    return ret;
+}

src/game/src/game.c

@@ -26,7 +26,7 @@ int game(void)
     {
         const struct human_player_cfg cfg =
         {
-            .sel_periph = HUMAN_PLAYER_PERIPH_KEYBOARD_MOUSE,
+            .sel_periph = HUMAN_PLAYER_PERIPH_TOUCH,
             .padn = i,
             .pl =
             {
@@ -86,8 +86,7 @@ int game(void)
                 terrain_update(&map);
 
                 if (terrain_render(&map, &h->cam)
-                    || human_player_render(h, &o)
-                    || cursor_render(&h->cam.cursor))
+                    || human_player_render(h, &o))
                     goto end;
 
                 /* TODO: render AI players. */

src/mouse/inc/mouse.h

@@ -16,12 +16,13 @@ enum mouse_button
 
 struct mouse
 {
-    short x, y;
+    short x, y, dx, dy;
     int mask, oldmask;
 };
 
 void mouse_init(struct mouse *m);
 void mouse_update(struct mouse *m);
+bool mouse_pressed(const struct mouse *m, enum mouse_button b);
 bool mouse_justpressed(const struct mouse *m, enum mouse_button b);
 bool mouse_justreleased(const struct mouse *m, enum mouse_button b);
 

src/mouse/sdl-1.2/src/mouse.c

@@ -39,6 +39,7 @@ static void mouse_event(const SDL_MouseMotionEvent *const ev,
 
 void mouse_update(struct mouse *const m)
 {
+    const short x = m->x, y = m->y;
     SDL_Event ev;
     int n;
 
@@ -71,6 +72,9 @@ void mouse_update(struct mouse *const m)
         }
     }
 
+    m->dx = m->x - x;
+    m->dy = m->y - y;
+
 end:
 
     if (n < 0)

src/mouse/src/mouse.c

@@ -1,6 +1,11 @@
 #include <mouse.h>
 #include <stdbool.h>
 
+bool mouse_pressed(const struct mouse *const m, const enum mouse_button b)
+{
+    return m->mask & (1 << b);
+}
+
 bool mouse_justpressed(const struct mouse *const m,
     const enum mouse_button b)
 {

src/player/inc/human_player.h

@@ -22,6 +22,7 @@ struct human_player_cfg
     enum human_player_periph
     {
         HUMAN_PLAYER_PERIPH_PAD,
+        HUMAN_PLAYER_PERIPH_TOUCH,
         HUMAN_PLAYER_PERIPH_KEYBOARD_MOUSE
     } sel_periph;
 
@@ -39,10 +40,12 @@ struct human_player
     {
         struct pad pad;
 
-        struct
+        struct human_player_kbm
         {
             struct mouse mouse;
             struct keyboard keyboard;
+            bool long_press, pan;
+            unsigned int lp_t;
         } kbm;
     } periph;
 

src/player/src/human_player.c

@@ -207,15 +207,33 @@ static bool select_resources(struct human_player *const h, const short x,
 }
 
 static bool select_instances(struct human_player *const h,
-    const struct player_others *const o, const bool excl)
+    const struct player_others *const o, const bool excl,
+    const bool same_type)
 {
     unsigned long x, y;
 
     cursor_pos(&h->cam, &x, &y);
 
-    return select_buildings(h, x, y, excl)
-        || select_units(h, x, y, excl)
-        || select_resources(h, x, y, o, excl);
+    if (!same_type || !h->n_sel)
+        return select_buildings(h, x, y, excl)
+            || select_units(h, x, y, excl)
+            || select_resources(h, x, y, o, excl);
+    else
+    {
+        switch (h->sel->type)
+        {
+            case INSTANCE_TYPE_UNIT:
+                return select_units(h, x, y, excl);
+
+            case INSTANCE_TYPE_BUILDING:
+                return select_buildings(h, x, y, excl);
+
+            case INSTANCE_TYPE_RESOURCE:
+                select_resources(h, x, y, o, excl);
+        }
+    }
+
+    return false;
 }
 
 static bool instance_collision(const struct camera *const cam,
@@ -518,7 +536,7 @@ static bool update_from_pad(struct human_player *const h,
         || pad_justpressed(p, PAD_KEY_EXIT))
         ret = true;
     else if (pad_justpressed(p, PAD_KEY_A))
-        select_instances(h, o, false);
+        select_instances(h, o, false, false);
     else if (pad_justpressed(p, PAD_KEY_B))
         move_units(h, o);
     else if (pad_justpressed(p, PAD_KEY_C))
@@ -529,10 +547,59 @@ static bool update_from_pad(struct human_player *const h,
     return ret;
 }
 
+static bool update_keyboard_mouse_common(const struct mouse *const m,
+    const struct keyboard *const k)
+{
+    bool ret = false;
+
+    if (keyboard_justreleased(k, &KEYBOARD_COMBO(KEYBOARD_KEY_EXIT)))
+        ret = true;
+    else if (keyboard_justreleased(k, &KEYBOARD_COMBO(KEYBOARD_KEY_F11)))
+        gfx_toggle_fullscreen();
+
+    return ret;
+}
+
+static bool update_from_touch(struct human_player *const h,
+    struct player_others *const o)
+{
+    struct mouse *const m = &h->periph.kbm.mouse;
+    struct keyboard *const k = &h->periph.kbm.keyboard;
+
+    mouse_update(m);
+    keyboard_update(k);
+
+    enum {DEAD_ZONE = 5};
+    struct human_player_kbm *const kbm = &h->periph.kbm;
+
+    if (mouse_pressed(m, MOUSE_BUTTON_LEFT) && !kbm->pan)
+    {
+        enum {LONG_PRESS_THRESHOLD = 30};
+
+        if (kbm->lp_t < LONG_PRESS_THRESHOLD)
+            kbm->lp_t++;
+        else if (!kbm->long_press)
+        {
+            kbm->long_press = true;
+            deselect_instances(h);
+        }
+    }
+    else if (mouse_justreleased(m, MOUSE_BUTTON_LEFT))
+    {
+        if (!kbm->pan && !select_instances(h, o, false, true))
+            move_units(h, o);
+
+        kbm->pan = false;
+        kbm->long_press = false;
+        kbm->lp_t = 0;
+    }
+
+    return update_keyboard_mouse_common(m, k);
+}
+
 static bool update_from_keyboard_mouse(struct human_player *const h,
     struct player_others *const o)
 {
-    bool ret = false;
     struct mouse *const m = &h->periph.kbm.mouse;
     struct keyboard *const k = &h->periph.kbm.keyboard;
 
@@ -545,17 +612,13 @@ static bool update_from_keyboard_mouse(struct human_player *const h,
             keyboard_pressed(k, &KEYBOARD_COMBO(KEYBOARD_KEY_LSHIFT))
             || keyboard_pressed(k, &KEYBOARD_COMBO(KEYBOARD_KEY_RSHIFT));
 
-        if (!select_instances(h, o, !shift_pressed))
+        if (!select_instances(h, o, !shift_pressed, false))
             deselect_instances(h);
     }
     else if (mouse_justreleased(m, MOUSE_BUTTON_RIGHT))
         move_units(h, o);
-    else if (keyboard_justreleased(k, &KEYBOARD_COMBO(KEYBOARD_KEY_EXIT)))
-        ret = true;
-    else if (keyboard_justreleased(k, &KEYBOARD_COMBO(KEYBOARD_KEY_F11)))
-        gfx_toggle_fullscreen();
 
-    return ret;
+    return update_keyboard_mouse_common(m, k);
 }
 
 bool human_player_update(struct human_player *const h,
@@ -577,6 +640,15 @@ bool human_player_update(struct human_player *const h,
                 camera_update_pad(&h->cam, &h->periph.pad);
                 break;
 
+            case HUMAN_PLAYER_PERIPH_TOUCH:
+            {
+                struct human_player_kbm *const kbm = &h->periph.kbm;
+
+                ret = update_from_touch(h, o);
+                kbm->pan |= camera_update_touch(&h->cam, &kbm->mouse);
+            }
+                break;
+
             case HUMAN_PLAYER_PERIPH_KEYBOARD_MOUSE:
                 ret = update_from_keyboard_mouse(h, o);
                 camera_update_mouse(&h->cam, &h->periph.kbm.mouse);
@@ -659,6 +731,21 @@ int human_player_render(const struct human_player *const h,
         || gui_render(h))
         return -1;
 
+    switch (h->sel_periph)
+    {
+        case HUMAN_PLAYER_PERIPH_PAD:
+            /* Fall through. */
+        case HUMAN_PLAYER_PERIPH_KEYBOARD_MOUSE:
+            cursor_render(&h->cam.cursor);
+            break;
+
+        case HUMAN_PLAYER_PERIPH_TOUCH:
+            break;
+
+        default:
+            return -1;
+    }
+
     return 0;
 }
 
@@ -672,6 +759,8 @@ int human_player_init(const struct human_player_cfg *const cfg,
 
     switch (h->sel_periph = cfg->sel_periph)
     {
+        case HUMAN_PLAYER_PERIPH_TOUCH:
+            /* Fall through. */
         case HUMAN_PLAYER_PERIPH_KEYBOARD_MOUSE:
             mouse_init(&h->periph.kbm.mouse);
             keyboard_init(&h->periph.kbm.keyboard);