346 lines
11 KiB
C
346 lines
11 KiB
C
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//========================================================================
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// Joystick input test
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// Copyright (c) Camilla Löwy <elmindreda@glfw.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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//
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// This test displays the state of every button and axis of every connected
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// joystick and/or gamepad
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//
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//========================================================================
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#include <glad/gl.h>
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#define GLFW_INCLUDE_NONE
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#include <GLFW/glfw3.h>
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#define NK_IMPLEMENTATION
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#define NK_INCLUDE_FIXED_TYPES
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#define NK_INCLUDE_FONT_BAKING
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#define NK_INCLUDE_DEFAULT_FONT
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#define NK_INCLUDE_DEFAULT_ALLOCATOR
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#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
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#define NK_INCLUDE_STANDARD_VARARGS
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#define NK_BUTTON_TRIGGER_ON_RELEASE
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#include <nuklear.h>
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#define NK_GLFW_GL2_IMPLEMENTATION
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#include <nuklear_glfw_gl2.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#ifdef _MSC_VER
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#define strdup(x) _strdup(x)
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#endif
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static GLFWwindow* window;
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static int joysticks[GLFW_JOYSTICK_LAST + 1];
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static int joystick_count = 0;
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static void error_callback(int error, const char* description)
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{
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fprintf(stderr, "Error: %s\n", description);
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}
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static void joystick_callback(int jid, int event)
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{
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if (event == GLFW_CONNECTED)
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joysticks[joystick_count++] = jid;
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else if (event == GLFW_DISCONNECTED)
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{
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int i;
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for (i = 0; i < joystick_count; i++)
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{
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if (joysticks[i] == jid)
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break;
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}
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for (i = i + 1; i < joystick_count; i++)
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joysticks[i - 1] = joysticks[i];
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joystick_count--;
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}
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if (!glfwGetWindowAttrib(window, GLFW_FOCUSED))
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glfwRequestWindowAttention(window);
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}
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static void drop_callback(GLFWwindow* window, int count, const char* paths[])
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{
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int i;
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for (i = 0; i < count; i++)
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{
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long size;
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char* text;
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FILE* stream = fopen(paths[i], "rb");
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if (!stream)
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continue;
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fseek(stream, 0, SEEK_END);
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size = ftell(stream);
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fseek(stream, 0, SEEK_SET);
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text = malloc(size + 1);
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text[size] = '\0';
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if (fread(text, 1, size, stream) == size)
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glfwUpdateGamepadMappings(text);
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free(text);
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fclose(stream);
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}
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}
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static const char* joystick_label(int jid)
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{
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static char label[1024];
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snprintf(label, sizeof(label), "%i: %s", jid + 1, glfwGetJoystickName(jid));
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return label;
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}
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static void hat_widget(struct nk_context* nk, unsigned char state)
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{
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float radius;
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struct nk_rect area;
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struct nk_vec2 center;
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if (nk_widget(&area, nk) == NK_WIDGET_INVALID)
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return;
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center = nk_vec2(area.x + area.w / 2.f, area.y + area.h / 2.f);
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radius = NK_MIN(area.w, area.h) / 2.f;
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nk_stroke_circle(nk_window_get_canvas(nk),
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nk_rect(center.x - radius,
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center.y - radius,
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radius * 2.f,
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radius * 2.f),
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1.f,
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nk_rgb(175, 175, 175));
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if (state)
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{
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const float angles[] =
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{
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0.f, 0.f,
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NK_PI * 1.5f, NK_PI * 1.75f,
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NK_PI, 0.f,
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NK_PI * 1.25f, 0.f,
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NK_PI * 0.5f, NK_PI * 0.25f,
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0.f, 0.f,
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NK_PI * 0.75f, 0.f,
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};
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const float cosa = nk_cos(angles[state]);
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const float sina = nk_sin(angles[state]);
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const struct nk_vec2 p0 = nk_vec2(0.f, -radius);
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const struct nk_vec2 p1 = nk_vec2( radius / 2.f, -radius / 3.f);
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const struct nk_vec2 p2 = nk_vec2(-radius / 2.f, -radius / 3.f);
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nk_fill_triangle(nk_window_get_canvas(nk),
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center.x + cosa * p0.x + sina * p0.y,
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center.y + cosa * p0.y - sina * p0.x,
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center.x + cosa * p1.x + sina * p1.y,
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center.y + cosa * p1.y - sina * p1.x,
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center.x + cosa * p2.x + sina * p2.y,
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center.y + cosa * p2.y - sina * p2.x,
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nk_rgb(175, 175, 175));
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}
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}
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int main(void)
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{
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int jid, hat_buttons = GLFW_FALSE;
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struct nk_context* nk;
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struct nk_font_atlas* atlas;
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memset(joysticks, 0, sizeof(joysticks));
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glfwSetErrorCallback(error_callback);
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if (!glfwInit())
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exit(EXIT_FAILURE);
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glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE);
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glfwWindowHint(GLFW_WIN32_KEYBOARD_MENU, GLFW_TRUE);
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window = glfwCreateWindow(800, 600, "Joystick Test", NULL, NULL);
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if (!window)
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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glfwMakeContextCurrent(window);
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gladLoadGL(glfwGetProcAddress);
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glfwSwapInterval(1);
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nk = nk_glfw3_init(window, NK_GLFW3_INSTALL_CALLBACKS);
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nk_glfw3_font_stash_begin(&atlas);
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nk_glfw3_font_stash_end();
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for (jid = GLFW_JOYSTICK_1; jid <= GLFW_JOYSTICK_LAST; jid++)
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{
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if (glfwJoystickPresent(jid))
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joysticks[joystick_count++] = jid;
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}
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glfwSetJoystickCallback(joystick_callback);
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glfwSetDropCallback(window, drop_callback);
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while (!glfwWindowShouldClose(window))
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{
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int i, width, height;
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glfwGetWindowSize(window, &width, &height);
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glClear(GL_COLOR_BUFFER_BIT);
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nk_glfw3_new_frame();
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if (nk_begin(nk,
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"Joysticks",
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nk_rect(width - 200.f, 0.f, 200.f, (float) height),
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NK_WINDOW_MINIMIZABLE |
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NK_WINDOW_TITLE))
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{
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nk_layout_row_dynamic(nk, 30, 1);
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nk_checkbox_label(nk, "Hat buttons", &hat_buttons);
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if (joystick_count)
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{
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for (i = 0; i < joystick_count; i++)
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{
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if (nk_button_label(nk, joystick_label(joysticks[i])))
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nk_window_set_focus(nk, joystick_label(joysticks[i]));
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}
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}
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else
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nk_label(nk, "No joysticks connected", NK_TEXT_LEFT);
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}
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nk_end(nk);
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for (i = 0; i < joystick_count; i++)
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{
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if (nk_begin(nk,
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joystick_label(joysticks[i]),
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nk_rect(i * 20.f, i * 20.f, 550.f, 570.f),
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NK_WINDOW_BORDER |
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NK_WINDOW_MOVABLE |
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NK_WINDOW_SCALABLE |
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NK_WINDOW_MINIMIZABLE |
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NK_WINDOW_TITLE))
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{
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int j, axis_count, button_count, hat_count;
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const float* axes;
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const unsigned char* buttons;
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const unsigned char* hats;
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GLFWgamepadstate state;
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nk_layout_row_dynamic(nk, 30, 1);
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nk_labelf(nk, NK_TEXT_LEFT, "Hardware GUID %s",
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glfwGetJoystickGUID(joysticks[i]));
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nk_label(nk, "Joystick state", NK_TEXT_LEFT);
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axes = glfwGetJoystickAxes(joysticks[i], &axis_count);
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buttons = glfwGetJoystickButtons(joysticks[i], &button_count);
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hats = glfwGetJoystickHats(joysticks[i], &hat_count);
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if (!hat_buttons)
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button_count -= hat_count * 4;
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for (j = 0; j < axis_count; j++)
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nk_slide_float(nk, -1.f, axes[j], 1.f, 0.1f);
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nk_layout_row_dynamic(nk, 30, 12);
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for (j = 0; j < button_count; j++)
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{
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char name[16];
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snprintf(name, sizeof(name), "%i", j + 1);
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nk_select_label(nk, name, NK_TEXT_CENTERED, buttons[j]);
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}
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nk_layout_row_dynamic(nk, 30, 8);
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for (j = 0; j < hat_count; j++)
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hat_widget(nk, hats[j]);
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nk_layout_row_dynamic(nk, 30, 1);
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if (glfwGetGamepadState(joysticks[i], &state))
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{
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int hat = 0;
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const char* names[GLFW_GAMEPAD_BUTTON_LAST + 1 - 4] =
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{
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"A", "B", "X", "Y",
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"LB", "RB",
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"Back", "Start", "Guide",
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"LT", "RT",
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};
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nk_labelf(nk, NK_TEXT_LEFT,
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"Gamepad state: %s",
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glfwGetGamepadName(joysticks[i]));
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nk_layout_row_dynamic(nk, 30, 2);
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for (j = 0; j <= GLFW_GAMEPAD_AXIS_LAST; j++)
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nk_slide_float(nk, -1.f, state.axes[j], 1.f, 0.1f);
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nk_layout_row_dynamic(nk, 30, GLFW_GAMEPAD_BUTTON_LAST + 1 - 4);
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for (j = 0; j <= GLFW_GAMEPAD_BUTTON_LAST - 4; j++)
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nk_select_label(nk, names[j], NK_TEXT_CENTERED, state.buttons[j]);
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if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_UP])
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hat |= GLFW_HAT_UP;
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if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_RIGHT])
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hat |= GLFW_HAT_RIGHT;
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if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_DOWN])
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hat |= GLFW_HAT_DOWN;
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if (state.buttons[GLFW_GAMEPAD_BUTTON_DPAD_LEFT])
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hat |= GLFW_HAT_LEFT;
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nk_layout_row_dynamic(nk, 30, 8);
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hat_widget(nk, hat);
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}
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else
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nk_label(nk, "Joystick has no gamepad mapping", NK_TEXT_LEFT);
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}
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nk_end(nk);
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}
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nk_glfw3_render(NK_ANTI_ALIASING_ON);
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glfwSwapBuffers(window);
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glfwPollEvents();
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}
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glfwTerminate();
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exit(EXIT_SUCCESS);
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}
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