/*
* Allocate an Element and store a duplicate of the data pointed to by
* obj in the Element. Modules do not get duplicated. The function needs
* to handle each type of object separately in a case statement.
*/
Element *element_init(ObjectType type, void *obj){
Element *e = malloc(sizeof(Element));
if(!e){
printf("malloc failed in element_init\n");
return NULL;
}
e->type = type;
e->next = NULL;
switch (e->type) {
case ObjNone:
printf("ObjNone not implemented in element_init\n");
break;
case ObjLine:
line_copy(&(e->obj.line), (Line*)obj);
break;
case ObjPoint:
point_copy(&(e->obj.point), (Point*)obj);
break;
case ObjPolyline:
polyline_init(&(e->obj.polyline));
polyline_copy(&(e->obj.polyline), (Polyline*)obj);
break;
case ObjPolygon:
polygon_init(&(e->obj.polygon));
polygon_copy(&(e->obj.polygon), (Polygon*)obj);
break;
case ObjIdentity:
break;
case ObjMatrix:
matrix_copy(&(e->obj.matrix), (Matrix*)obj);
break;
case ObjColor:
case ObjBodyColor:
case ObjSurfaceColor:
color_copy(&(e->obj.color), (Color*)obj);
break;
case ObjSurfaceCoeff:
e->obj.coeff = *(float*)obj;
break;
case ObjLight:
printf("ObjLight not implemented in element_init\n");
break;
case ObjModule:
e->obj.module = obj;
break;
default:
printf("ObjectType %d is not handled in element_init\n",type);
}
return e;
}
// draw some random lines, then two boxes
int main(int argc, char *argv[]) {
const int nPoints = 1000;
Polyline thing1;
Polyline *thing2;
Point p[nPoints];
int i;
int rows = 500;
int cols = 500;
Image *src;
Color Blue;
Color Red;
Color Green;
Color_set( &Blue, 0.1, 0.15, 0.7 );
Color_set( &Red, 0.8, 0.2, 0.1 );
Color_set( &Green, 0.2, 0.6, 0.2 );
printf("Startup\n");
for(i=0;i<nPoints;i++) {
point_set2D( &(p[i]), drand48()*cols/2, drand48()*rows/2 );
}
// init is necessary, because otherwise the fields are full of garbage
printf("Polyline init and set\n");
polyline_init( &thing1 );
polyline_set( &thing1, 20, &( p[42] ) );
printf("Polyline create\n");
thing2 = polyline_createp( 10, &(p[105] ) );
printf("Creating image\n");
src = image_create( rows, cols );
printf("Drawing poly-lines\n");
// draw some random lines
polyline_draw( &thing1, src, Blue );
polyline_draw( thing2, src, Red );
// draw a box going counter-clockwise, should be ok
point_set2D( &(p[500]), 50, 300 );
point_set2D( &(p[501]), 50, 350 );
point_set2D( &(p[502]), 100, 350 );
point_set2D( &(p[503]), 100, 300 );
point_set2D( &(p[504]), 50, 300 );
printf("Counter-clockwise box\n");
polyline_set( thing2, 5, &(p[500]) );
polyline_draw( thing2, src, Green );
// draw a box going clockwise, should not be ok
point_set2D( &(p[500]), 350, 300 );
point_set2D( &(p[501]), 400, 300 );
point_set2D( &(p[502]), 400, 350 );
point_set2D( &(p[503]), 350, 350 );
point_set2D( &(p[504]), 350, 300 );
printf("Clockwise box\n");
polyline_set( thing2, 5, &(p[500]) );
polyline_draw( thing2, src, Green );
image_write( src, "test3c.ppm");
printf("Cleanup\n");
polyline_clear( &thing1 );
printf("clear\n");
polyline_free( thing2 );
printf("free\n");
image_free( src );
return(0);
}
