started ropesim tool

[dosdemo] / tools / ropesim / src / main.c

diff --git a/tools/ropesim/src/main.c b/tools/ropesim/src/main.c
new file mode 100644 (file)
index 0000000..dcabef5
--- /dev/null
+++ b/tools/ropesim/src/main.c
@@ -0,0 +1,167 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+#include "cmesh.h"
+
+int init(void);
+void cleanup(void);
+void display(void);
+void idle(void);
+void reshape(int x, int y);
+void keyb(unsigned char key, int x, int y);
+void mouse(int bn, int st, int x, int y);
+void motion(int x, int y);
+void sball_motion(int x, int y, int z);
+void sball_rotate(int rx, int ry, int rz);
+void sball_button(int bn, int st);
+
+float cam_theta, cam_phi, cam_dist = 10;
+int prev_mx, prev_my;
+int bnstate[8];
+
+struct cmesh *scn;
+
+int main(int argc, char **argv)
+{
+       glutInit(&argc, argv);
+       glutInitWindowSize(800, 600);
+       glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+       glutCreateWindow("ropesim");
+
+       glutDisplayFunc(display);
+       glutIdleFunc(idle);
+       glutReshapeFunc(reshape);
+       glutKeyboardFunc(keyb);
+       glutMouseFunc(mouse);
+       glutMotionFunc(motion);
+       glutSpaceballMotionFunc(sball_motion);
+       glutSpaceballRotateFunc(sball_rotate);
+       glutSpaceballButtonFunc(sball_button);
+
+       if(init() == -1) {
+               return 1;
+       }
+       atexit(cleanup);
+
+       glutMainLoop();
+       return 0;
+}
+
+
+int init(void)
+{
+       float amb[] = {0.05, 0.05, 0.08, 1};
+
+       glEnable(GL_CULL_FACE);
+       glEnable(GL_DEPTH_TEST);
+       glEnable(GL_LIGHTING);
+       glEnable(GL_LIGHT0);
+       glEnable(GL_LIGHT1);
+       glEnable(GL_LIGHT2);
+
+       glLightModelfv(GL_LIGHT_MODEL_AMBIENT, amb);
+
+       if(!(scn = cmesh_alloc()) || cmesh_load(scn, "gimbal.obj") == -1) {
+               fprintf(stderr, "failed to load scene file\n");
+               return -1;
+       }
+       return 0;
+}
+
+void cleanup(void)
+{
+       cmesh_free(scn);
+}
+
+void display(void)
+{
+       static const float lpos[][4] = {
+               {-100, 100, 200, 1},
+               {100, 80, 50, 1},
+               {20, -50, -150, 1}
+       };
+       static const float lcol[][4] = {
+               {0.9, 0.9, 0.9, 1},
+               {0.5, 0.3, 0.2, 1},
+               {0.2, 0.3, 0.2, 1}
+       };
+       int i;
+
+       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+       glMatrixMode(GL_MODELVIEW);
+       glLoadIdentity();
+       glTranslatef(0, 0, -cam_dist);
+       glRotatef(cam_phi, 1, 0, 0);
+       glRotatef(cam_theta, 0, 1, 0);
+
+       for(i=0; i<3; i++) {
+               glLightfv(GL_LIGHT0 + i, GL_POSITION, lpos[i]);
+               glLightfv(GL_LIGHT0 + i, GL_DIFFUSE, lcol[i]);
+       }
+
+       cmesh_draw(scn);
+
+       glutSwapBuffers();
+}
+void idle(void)
+{
+       glutPostRedisplay();
+}
+
+void reshape(int x, int y)
+{
+       glViewport(0, 0, x, y);
+       glMatrixMode(GL_PROJECTION);
+       glLoadIdentity();
+       gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);
+}
+
+void keyb(unsigned char key, int x, int y)
+{
+       switch(key) {
+       case 27:
+               exit(0);
+       }
+}
+
+void mouse(int bn, int st, int x, int y)
+{
+       prev_mx = x;
+       prev_my = y;
+       bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
+}
+
+void motion(int x, int y)
+{
+       int dx = x - prev_mx;
+       int dy = y - prev_my;
+       prev_mx = x;
+       prev_my = y;
+
+       if(!(dx | dy)) return;
+
+       if(bnstate[0]) {
+               cam_theta += dx * 0.5;
+               cam_phi += dy * 0.5;
+               if(cam_phi < -90) cam_phi = -90;
+               if(cam_phi > 90) cam_phi = 90;
+       }
+
+       if(bnstate[2]) {
+               cam_dist += dy * 0.1;
+               if(cam_dist < 0.0f) cam_dist = 0.0f;
+       }
+}
+
+void sball_motion(int x, int y, int z)
+{
+}
+
+void sball_rotate(int rx, int ry, int rz)
+{
+}
+
+void sball_button(int bn, int st)
+{
+}