Implement touch controls

3 files changed, 59 insertions, 1 deletions

diff --git a/src/camera/CMakeLists.txt b/src/camera/CMakeLists.txt
index 3d9d113..f234098 100644
--- a/src/camera/CMakeLists.txt
+++ b/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)
diff --git a/src/camera/inc/camera.h b/src/camera/inc/camera.h
index ec2739b..93ad740 100644
--- a/src/camera/inc/camera.h
+++ b/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);
diff --git a/src/camera/src/touch.c b/src/camera/src/touch.c
new file mode 100644
index 0000000..475b308
--- /dev/null
+++ b/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;
+}