156 lines
3.2 KiB
C
156 lines
3.2 KiB
C
#include "mcompass.h"
|
|
|
|
#include <Mw/Widget/OpenGL.h>
|
|
|
|
MwWidget window, opengl;
|
|
int ww, wh;
|
|
|
|
static void resize(MwWidget handle, void* user, void* client) {
|
|
ww = MwGetInteger(window, MwNwidth);
|
|
wh = MwGetInteger(window, MwNheight);
|
|
|
|
MwVaApply(opengl,
|
|
MwNwidth, ww,
|
|
MwNheight, wh,
|
|
NULL);
|
|
|
|
glViewport(0, 0, ww, wh);
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glOrtho(-1, 1, -1, 1, -1, 1);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
}
|
|
|
|
static void tick(MwWidget handle, void* user, void* client) {
|
|
int i;
|
|
double rad;
|
|
int cx, cy;
|
|
MwPoint p;
|
|
|
|
cx = MwGetInteger(window, MwNx) + ww / 2;
|
|
cy = MwGetInteger(window, MwNy) + wh / 2;
|
|
MwGetCursorCoord(window, &p);
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glColor3f(0, 0, 0);
|
|
for(i = 0; i < 360; i += 10) {
|
|
rad = i / 180.0 * M_PI;
|
|
|
|
glBegin(GL_LINES);
|
|
glVertex2f(cos(rad), sin(rad));
|
|
glVertex2f(cos(rad) * 0.9, sin(rad) * 0.9);
|
|
glEnd();
|
|
}
|
|
glBegin(GL_LINES);
|
|
glVertex2f(-0.6, 0);
|
|
glVertex2f(0.6, 0);
|
|
glVertex2f(0, -0.6);
|
|
glVertex2f(0, 0.6);
|
|
glEnd();
|
|
glBegin(GL_LINE_STRIP);
|
|
for(i = 0; i <= 360; i += 10) {
|
|
rad = i / 180.0 * M_PI;
|
|
glVertex2f(cos(rad) * 0.2, sin(rad) * 0.2);
|
|
}
|
|
glEnd();
|
|
|
|
/* memo: size is 0.2x0.2 */
|
|
|
|
glLineWidth(2);
|
|
|
|
glColor3f(1, 0, 0);
|
|
glBegin(GL_LINE_STRIP); /* N */
|
|
glVertex2f(-0.1, 0.65);
|
|
glVertex2f(-0.1, 0.85);
|
|
glVertex2f(0.1, 0.65);
|
|
glVertex2f(0.1, 0.85);
|
|
glEnd();
|
|
|
|
glColor3f(0, 0, 0);
|
|
glBegin(GL_LINE_STRIP); /* W */
|
|
glVertex2f(-0.85, -0.1);
|
|
glVertex2f(-0.65, -0.05);
|
|
glVertex2f(-0.85, 0);
|
|
glVertex2f(-0.65, 0.05);
|
|
glVertex2f(-0.85, 0.1);
|
|
glEnd();
|
|
|
|
glBegin(GL_LINE_STRIP); /* S */
|
|
glVertex2f(-0.1, -0.85);
|
|
glVertex2f(0.1, -0.85);
|
|
glVertex2f(0.1, -0.75);
|
|
glVertex2f(-0.1, -0.75);
|
|
glVertex2f(-0.1, -0.65);
|
|
glVertex2f(0.1, -0.65);
|
|
glEnd();
|
|
|
|
glBegin(GL_LINE_STRIP); /* E */
|
|
glVertex2f(0.85, -0.1);
|
|
glVertex2f(0.85, 0.1);
|
|
glVertex2f(0.65, 0.1);
|
|
glVertex2f(0.65, -0.1);
|
|
glEnd();
|
|
glBegin(GL_LINES);
|
|
glVertex2f(0.75, -0.1);
|
|
glVertex2f(0.75, 0.1);
|
|
glEnd();
|
|
|
|
glLineWidth(1);
|
|
|
|
rad = atan2(-(p.y - cy), p.x - cx);
|
|
|
|
for(i = 0; i < 2; i++) {
|
|
double n = 90 / 180.0 * M_PI;
|
|
if(i == 0) {
|
|
glColor3f(1, 0, 0);
|
|
} else {
|
|
glColor3f(0.2, 0.2, 0.2);
|
|
}
|
|
glBegin(GL_TRIANGLES);
|
|
glVertex2f(cos(rad) * 0.95, sin(rad) * 0.95);
|
|
glVertex2f(cos(rad - n) * 0.05, sin(rad - n) * 0.05);
|
|
glVertex2f(cos(rad + n) * 0.05, sin(rad + n) * 0.05);
|
|
glEnd();
|
|
|
|
rad -= n * 2;
|
|
}
|
|
glColor3f(0.6, 0.6, 0.6);
|
|
glBegin(GL_TRIANGLE_FAN);
|
|
for(i = 0; i <= 360; i += 10) {
|
|
rad = i / 180.0 * M_PI;
|
|
glVertex2f(cos(rad) * 0.05 * 2 / 3, sin(rad) * 0.05 * 2 / 3);
|
|
}
|
|
glEnd();
|
|
|
|
MwOpenGLSwapBuffer(opengl);
|
|
}
|
|
|
|
int main() {
|
|
MwLLColor col;
|
|
int r, g, b;
|
|
|
|
MwLibraryInit();
|
|
|
|
window = MwVaCreateWidget(MwWindowClass, "main", NULL, MwDEFAULT, MwDEFAULT, 150, 150,
|
|
MwNtitle, "mcompass",
|
|
NULL);
|
|
|
|
opengl = MwCreateWidget(MwOpenGLClass, "opengl", window, 0, 0, 150, 150);
|
|
|
|
MwOpenGLMakeCurrent(opengl);
|
|
|
|
col = MwParseColor(window, MwGetText(window, MwNbackground));
|
|
MwGetColor(col, &r, &g, &b);
|
|
MwLLFreeColor(col);
|
|
|
|
glClearColor(r / 255.0, g / 255.0, b / 255.0, 1);
|
|
|
|
resize(window, NULL, NULL);
|
|
|
|
MwAddUserHandler(window, MwNresizeHandler, resize, NULL);
|
|
MwAddUserHandler(window, MwNtickHandler, tick, NULL);
|
|
|
|
MwLoop(window);
|
|
}
|