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gears: Allow model rotation with pointer

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Scott Moreau 2012-04-24 11:28:26 -06:00 committed by Kristian Høgsberg
parent e10d279017
commit 7890c4d36d
1 changed files with 65 additions and 4 deletions
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69
clients/gears.c
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@ -36,6 +36,7 @@
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <linux/input.h>
#include <wayland-client.h>
#include "window.h"
@ -51,6 +52,14 @@ struct gears {
EGLContext context;
GLfloat angle;
struct {
GLfloat rotx;
GLfloat roty;
} view;
int button_down;
int last_x, last_y;
GLint gear_list[3];
};
@ -212,10 +221,54 @@ static const struct wl_callback_listener listener = {
frame_callback
};
static int
motion_handler(struct widget *widget, struct input *input,
uint32_t time, int32_t x, int32_t y, void *data)
{
struct gears *gears = data;
int offset_x, offset_y;
float step = 0.5;
if (gears->button_down) {
offset_x = x - gears->last_x;
offset_y = y - gears->last_y;
gears->last_x = x;
gears->last_y = y;
gears->view.roty += offset_x * step;
gears->view.rotx += offset_y * step;
if (gears->view.roty >= 360)
gears->view.roty = gears->view.roty - 360;
if (gears->view.roty <= 0)
gears->view.roty = gears->view.roty + 360;
if (gears->view.rotx >= 360)
gears->view.rotx = gears->view.rotx - 360;
if (gears->view.rotx <= 0)
gears->view.rotx = gears->view.rotx + 360;
}
return POINTER_LEFT_PTR;
}
static void
button_handler(struct widget *widget, struct input *input,
uint32_t time, int button, int state, void *data)
{
struct gears *gears = data;
if (button == BTN_LEFT) {
if (state) {
gears->button_down = 1;
input_get_position(input,
&gears->last_x, &gears->last_y);
} else {
gears->button_down = 0;
}
}
}
static void
redraw_handler(struct widget *widget, void *data)
{
GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
struct rectangle window_allocation;
struct rectangle allocation;
struct wl_callback *callback;
@ -245,9 +298,8 @@ redraw_handler(struct widget *widget, void *data)
glTranslatef(0.0, 0.0, -50);
glRotatef(view_rotx, 1.0, 0.0, 0.0);
glRotatef(view_roty, 0.0, 1.0, 0.0);
glRotatef(view_rotz, 0.0, 0.0, 1.0);
glRotatef(gears->view.rotx, 1.0, 0.0, 0.0);
glRotatef(gears->view.roty, 0.0, 1.0, 0.0);
glPushMatrix();
glTranslatef(-3.0, -2.0, 0.0);
@ -340,6 +392,13 @@ gears_create(struct display *display)
glEndList();
}
gears->button_down = 0;
gears->last_x = 0;
gears->last_y = 0;
gears->view.rotx = 20.0;
gears->view.roty = 30.0;
glEnable(GL_NORMALIZE);
glMatrixMode(GL_PROJECTION);
@ -357,6 +416,8 @@ gears_create(struct display *display)
window_set_user_data(gears->window, gears);
widget_set_resize_handler(gears->widget, resize_handler);
widget_set_redraw_handler(gears->widget, redraw_handler);
widget_set_button_handler(gears->widget, button_handler);
widget_set_motion_handler(gears->widget, motion_handler);
window_set_keyboard_focus_handler(gears->window,
keyboard_focus_handler);