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PC: implement joystick support #17

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PC: implement joystick support #17

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34 changes: 31 additions & 3 deletions source/platform/input.c
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@ extern GLFWwindow* window;
static bool input_pointer_enabled;
static double input_old_pointer_x, input_old_pointer_y;
static bool input_key_held[1024];
static int joystick = -1;

void input_init() {
for(int k = 0; k < 1024; k++)
Expand All @@ -40,6 +41,27 @@ void input_init() {
input_pointer_enabled = false;
input_old_pointer_x = 0;
input_old_pointer_y = 0;

// Find joystick
glfwInit();
for(int joy = GLFW_JOYSTICK_1; joy <= GLFW_JOYSTICK_LAST; joy++) {
int num_axes = 0;
const float *axes = glfwGetJoystickAxes(joy, &num_axes);
if(num_axes < 2) continue;

/* Workaround some buggy motherboard which reports the LED controller
* as a joystick; in such cases the controller is reported as having a
* ridiculously high number of axes. See for example:
* https://bbs.archlinux.org/viewtopic.php?id=261161
*/
if (num_axes >= 10) {
fprintf(stderr, "Skipping controller '%s' with %d axes\n",
glfwGetJoystickName(joy), num_axes);
continue;
}
joystick = joy;
break;
}
}

void input_poll() { }
Expand Down Expand Up @@ -103,16 +125,22 @@ bool input_pointer(float* x, float* y, float* angle) {
}

void input_native_joystick(float dt, float* dx, float* dy) {
*dx = 0.0F;
*dy = 0.0F;
if(!input_pointer_enabled) {
double x2, y2;
glfwGetCursorPos(window, &x2, &y2);
*dx = (x2 - input_old_pointer_x) * 0.001F;
*dy = -(y2 - input_old_pointer_y) * 0.001F;
input_old_pointer_x = x2;
input_old_pointer_y = y2;
} else {
*dx = 0.0F;
*dy = 0.0F;
} else if(joystick >= 0) {
int num_axes = 0;
const float *axes = glfwGetJoystickAxes(joystick, &num_axes);
if(axes && num_axes >= 2) {
*dx = axes[0] * dt;
*dy = -axes[1] * dt;
}
}
}

Expand Down