add DPad

Author: orsinium

src/firefly.c

@@ -21,24 +21,38 @@ Angle degrees(float a)
     return r;
 };
 
+/// @brief Time in the number of samples.
 AudioTime samples(int32_t s)
 {
     struct AudioTime t = {s};
     return t;
 }
 
+/// @brief Time in seconds.
 AudioTime seconds(int32_t s)
 {
     struct AudioTime t = {s * SAMPLE_RATE};
     return t;
 }
 
+/// @brief Time in miliseconds.
 AudioTime miliseconds(int32_t s)
 {
     struct AudioTime t = {s * SAMPLE_RATE / 1000};
     return t;
 }
 
+/// @brief Convert Pad to DPad.
+DPad pad_to_dpad(Pad pad)
+{
+    DPad dpad = {
+        .left = pad.x <= -100,
+        .right = pad.x >= 100,
+        .up = pad.y <= -100,
+        .down = pad.y >= 100};
+    return dpad;
+}
+
 // -- GRAPHICS -- //
 
 /// @brief Fill the whole frame with the given color.

src/firefly.h

@@ -174,6 +174,20 @@ struct Pad
 };
 typedef struct Pad Pad;
 
+/// @brief A classic 4-button representation of the Pad.
+struct DPad
+{
+    /// @brief If the left segment of the Pad is pressed.
+    bool left;
+    /// @brief If the right segment of the Pad is pressed.
+    bool right;
+    /// @brief If the upper segment of the Pad is pressed.
+    bool up;
+    /// @brief If the lower segment of the Pad is pressed.
+    bool down;
+};
+typedef struct DPad DPad;
+
 /// @brief State of the buttons. True is pressed, false is released.
 struct Buttons
 {
@@ -316,6 +330,7 @@ Angle degrees(float a);
 AudioTime samples(int32_t s);
 AudioTime seconds(int32_t s);
 AudioTime miliseconds(int32_t s);
+DPad pad_to_dpad(Pad pad);
 
 void clear_screen(Color c);
 void set_color(Color c, RGB v);