void view_rotate_circle(Polygon* poly_vrp, Point* center, int sides, double scale, double thetax, double thetay, double thetaz){
if(NULL != poly_vrp){
//make a unit circle of "sides" number fo sides and store the points in the poly_vrp
int i;
double x, z;
polygon_init(poly_vrp);
Point p[sides];
Matrix LTM;
matrix_identity(<M);
matrix_scale(<M, scale, scale, scale);
matrix_rotateX(<M, cos(thetax*M_PI/180), sin(thetax*M_PI/180));
matrix_rotateY(<M, cos(thetay*M_PI/180), sin(thetay*M_PI/180));
matrix_rotateZ(<M, cos(thetaz*M_PI/180), sin(thetaz*M_PI/180));
matrix_translate(<M, center->val[0], center->val[1], center->val[2]);
for(i=0; i<sides; i++){
x = cos( i * M_PI * 2.0 / sides );
z = sin( i * M_PI * 2.0 / sides );
point_set3D(&p[i], x, 0.1, z);
}
polygon_set(poly_vrp, sides, &p[0]);
matrix_xformPolygon(<M, poly_vrp);
}
}
int main(int argc, char *argv[]) {
const int rows = 1000;
const int cols = 1000;
View3D view;
Matrix vtm;
Polygon side[4];
Polygon tpoly;
Point tv[3];
Point v[4];
Color color[4];
Image *src;
char filename[100];
double x;
int i;
// set some colors
Color_set( &color[0], 0, 0, 1 );
Color_set( &color[1], 0, 1, 0 );
Color_set( &color[2], 1, 0, 0 );
Color_set( &color[3], 1, 0, 1 );
// initialize polygons
for(i=0;i<4;i++) {
polygon_init( &side[i] );
}
// corners of a cube, centered at (0, 0, 0)
point_set3D( &v[0], 0, 1, 0 );
point_set3D( &v[1], 1, -1, 0);
point_set3D( &v[2], -1, -1, 0 );
point_set3D( &v[3], 0, 0, 1 );
//base of the pyramid
polygon_set(&side[3], 3, &(v[0]));
//side1
point_copy(&tv[0], &v[0]);
point_copy(&tv[1], &v[2]);
point_copy(&tv[2], &v[3]);
polygon_set(&side[0], 3, tv);
//side2
point_copy(&tv[0], &v[0]);
point_copy(&tv[1], &v[1]);
point_copy(&tv[2], &v[3]);
polygon_set(&side[1], 3, tv);
//side3
point_copy(&tv[0], &v[1]);
point_copy(&tv[1], &v[2]);
point_copy(&tv[2], &v[3]);
polygon_set(&side[2], 3, tv);
point_set3D( &(view.vrp), 1, 0, 0);
vector_set( &(view.vpn), -view.vrp.val[0], -view.vrp.val[1], -view.vrp.val[2] );
vector_set( &(view.vup), 0, 0, 1 );
view.d = 1; // focal length
view.du = 2;
view.dv = view.du * (float)rows / cols;
view.f = 0; // front clip plane
view.b = 4; // back clip plane
view.screenx = cols;
view.screeny = rows;
matrix_setView3D( &vtm, &view );
// use a temprary polygon to transform stuff
polygon_init( &tpoly );
printf("Drawing pyramid\n");
x = -2;
int j;
for (j=0; j<50; j++){
// create image
src = image_create( rows, cols );
point_set3D(&(view.vrp), x , 2, 0.5);
vector_set( &(view.vpn), -x, -2, -0.5);
matrix_setView3D(&vtm, &view);
i=0;
for(i=0;i<4;i++) {
polygon_copy( &tpoly, &side[i] );
matrix_xformPolygon( &vtm, &tpoly );
// normalize by homogeneous coordinate before drawing
polygon_normalize( &tpoly );
polygon_draw( &tpoly, src, color[i] );
//polygon_print( &tpoly, stdout );
}
printf("Writing image\n");
sprintf(filename, "pyramid_%04d.ppm", j);
image_write( src, filename);
free(src);
if(j<25){
x += 0.08;
}else{
x -= 0.08;
}
}
printf("Making the .gif file...\n");
system("convert -delay 10 pyramid_*.ppm ../images/ext1.gif");
system("rm -f pyramid*");
return(0);
}
int main(int argc, char *argv[]) {
const int rows = 180;
const int cols = 320;
const int nFrames = 100;
View3D view;
Matrix vtm;
Polygon side[6];
Polygon tpoly;
Point tv[4];
Point v[8];
Color color[6];
Image *src;
int i, t;
char filename[256];
// set some colors
color_set( &color[0], 0, 0, 1 );
color_set( &color[1], 0, 1, 0 );
color_set( &color[2], 1, 0, 0 );
color_set( &color[3], 1, 0, 1 );
color_set( &color[4], 0, 1, 1 );
color_set( &color[5], 1, 1, 0 );
for(t=0;t<nFrames;t++) {
// initialize polygons
for(i=0;i<6;i++) {
polygon_init( &side[i] );
}
// corners of a cube, centered at (0, 0, 0)
point_set1( &v[0], -1, -1, -1 );
point_set1( &v[1], 1, -1, -1 );
point_set1( &v[2], 1, 1, -1 );
point_set1( &v[3], -1, 1, -1 );
point_set1( &v[4], -1, -1, 1 );
point_set1( &v[5], 1, -1, 1 );
point_set1( &v[6], 1, 1, 1 );
point_set1( &v[7], -1, 1, 1 );
// front side
polygon_set( &side[0], 4, &(v[0]) );
// back side
polygon_set( &side[1], 4, &(v[4]) );
// top side
point_copy( &tv[0], &v[2] );
point_copy( &tv[1], &v[3] );
point_copy( &tv[2], &v[7] );
point_copy( &tv[3], &v[6] );
polygon_set( &side[2], 4, tv );
// bottom side
point_copy( &tv[0], &v[0] );
point_copy( &tv[1], &v[1] );
point_copy( &tv[2], &v[5] );
point_copy( &tv[3], &v[4] );
polygon_set( &side[3], 4, tv );
// left side
point_copy( &tv[0], &v[0] );
point_copy( &tv[1], &v[3] );
point_copy( &tv[2], &v[7] );
point_copy( &tv[3], &v[4] );
polygon_set( &side[4], 4, tv );
// right side
point_copy( &tv[0], &v[1] );
point_copy( &tv[1], &v[2] );
point_copy( &tv[2], &v[6] );
point_copy( &tv[3], &v[5] );
polygon_set( &side[5], 4, tv );
// grab command line argument to determine viewpoint
// and set up the view structure
/*if( argc > 1 ) {
float alpha = atof( argv[1] );
if( alpha < 0.0 || alpha > 1.0 )
alpha = 0.0;
point_set1( &(view.vrp), 3*alpha, 2*alpha, -2*alpha - (1.0-alpha)*3 );
}
else {
point_set1( &(view.vrp), 3, 2, -2 );
} */
float alpha = abs(t - (0.5*nFrames)) / (0.5*nFrames);
point_set1( &(view.vrp), 3*alpha, 2*alpha, -2*alpha - (1.0-alpha)*3 );
vector_set( &(view.vpn), -view.vrp.val[0], -view.vrp.val[1], -view.vrp.val[2] );
vector_set( &(view.vup), 0, 1, 0 );
view.d = 1; // focal length
view.du = 2;
view.dv = view.du * (float)rows / cols;
view.f = 0; // front clip plane
view.b = 4; // back clip plane
view.screenx = cols;
view.screeny = rows;
matrix_setView3D( &vtm, &view );
// create image
src = image_create( rows, cols );
// use a temprary polygon to transform stuff
polygon_init( &tpoly );
//printf("Drawing Polygons\n");
for(i=0;i<6;i++) {
polygon_copy( &tpoly, &side[i] );
matrix_xformPolygon( &vtm, &tpoly );
// normalize by homogeneous coordinate before drawing
polygon_normalize( &tpoly );
polygon_draw( &tpoly, src, color[i] );
//polygon_print( &tpoly, stdout );
}
sprintf(filename, "frame-%04d.ppm", t );
image_write( src, filename );
/*printf("Writing image\n");
image_write( src, "cube.ppm" );*/
}
system("convert frame-*.ppm cube.gif");
system("rm frame-*.ppm");
return(0);
}
/*
* insert a pyramid into the module
*/
void module_pyramid(Module *md, int solid, float size, float x, float y, float z){
if(!md){
printf("Null md passed to module_pyramid\n");
return;
}
Polygon side;
Point tv[3];
Point v[5];
Line l;
Element *e;
int i;
polygon_init(&side);
// corners of the pyramid
point_set3D(&v[0], -1, -1, -1 );
point_set3D(&v[1], 1, -1, -1 );
point_set3D(&v[2], 1, -1, 1 );
point_set3D(&v[3], -1, -1, 1 );
point_set3D(&v[4], 0, 0, 0);
//printf("points created\n");
// set pyramid parameters
module_scale(md, (int)size, (int)size, (int)size);
module_translate(md, (float)x, (float)y, (float)z);
//printf("parameters set\n");
if (solid == 0){
// add only lines
// foundation
for(i=0;i<3;i++){
line_set( &l, v[i], v[i+1] );
e = element_init(ObjLine, &l);
module_insert(md, e);
}
line_set( &l, v[3], v[0] );
e = element_init(ObjLine, &l);
module_insert(md, e);
// connecting lines
line_set( &l, v[4], v[0] );
e = element_init(ObjLine, &l);
module_insert(md, e);
line_set( &l, v[1], v[4] );
e = element_init(ObjLine, &l);
module_insert(md, e);
line_set( &l, v[2], v[4] );
e = element_init(ObjLine, &l);
module_insert(md, e);
line_set( &l, v[3], v[4] );
e = element_init(ObjLine, &l);
module_insert(md, e);
//printf("successfully passed to module\n");
} else{
// front side
point_copy(&tv[0], &v[0]);
point_copy(&tv[1], &v[1]);
point_copy(&tv[2], &v[4]);
polygon_set(&side, 3, tv);
e = element_init(ObjPolygon, &side);
module_insert(md, e);
// back side
point_copy(&tv[0], &v[3]);
point_copy(&tv[1], &v[2]);
point_copy(&tv[2], &v[4]);
polygon_set(&side, 3, tv);
e = element_init(ObjPolygon, &side);
module_insert(md, e);
// bottom side
polygon_set(&side, 4, &(v[0]));
e = element_init(ObjPolygon, &side);
module_insert(md, e);
// left side
point_copy(&tv[0], &v[0]);
point_copy(&tv[1], &v[3]);
point_copy(&tv[2], &v[4]);
polygon_set(&side, 3, tv);
e = element_init(ObjPolygon, &side);
module_insert(md, e);
// right side
point_copy(&tv[0], &v[1]);
point_copy(&tv[1], &v[2]);
point_copy(&tv[2], &v[4]);
polygon_set(&side, 3, tv);
e = element_init(ObjPolygon, &side);
module_insert(md, e);
//printf("successfully passed to module\n");
}
polygon_clear(&side);
}
/*
* Sourced from coursework file test6b.c (Bruce Maxwell)
*/
void module_cone( Module *mod, int sides, int fill, int size, float x, float y, float z) {
Polygon p;
Point xtop, xbot;
Element *e;
Line l;
double x1, x2, z1, z2;
int i;
if(!mod){
printf("Null md passed to module_cylinder\n");
return;
}
// set cone parameters
module_scale(mod, (int)size, (int)size, (int)size);
module_translate(mod, (float)x, (float)y, (float)z);
printf("parameters set\n");
polygon_init( &p );
point_set3D( &xtop, 0, 1.0, 0.0 );
point_set3D( &xbot, 0, 0.0, 0.0 );
if (fill == 1){
// make a fan for the top and bottom sides
// and quadrilaterals for the sides
for(i=0;i<sides;i++) {
Point pt[6];
x1 = cos( i * M_PI * 2.0 / sides );
z1 = sin( i * M_PI * 2.0 / sides );
x2 = cos( ( (i+1)%sides ) * M_PI * 2.0 / sides );
z2 = sin( ( (i+1)%sides ) * M_PI * 2.0 / sides );
point_copy( &pt[0], &xbot );
point_set3D( &pt[1], x1, 0.0, z1 );
point_set3D( &pt[2], x2, 0.0, z2 );
polygon_set( &p, 3, pt );
e = element_init(ObjPolygon, &p);
module_insert(mod, e);
point_set3D( &pt[3], x1, 0.0, z1 );
point_set3D( &pt[4], x2, 0.0, z2 );
point_copy( &pt[5], &xtop);
polygon_set( &p, 3, &pt[3] );
e = element_init(ObjPolygon, &p);
module_insert(mod, e);
}
} else{
// make a fan for the top and bottom sides
// and quadrilaterals for the sides
for(i=0;i<sides;i++) {
Point pt[8];
x1 = cos( i * M_PI * 2.0 / sides );
z1 = sin( i * M_PI * 2.0 / sides );
x2 = cos( ( (i+1)%sides ) * M_PI * 2.0 / sides );
z2 = sin( ( (i+1)%sides ) * M_PI * 2.0 / sides );
point_copy( &pt[0], &xbot );
point_set3D( &pt[1], x1, 0.0, z1 );
point_set3D( &pt[2], x2, 0.0, z2 );
line_set( &l, pt[0], pt[1] );
e = element_init(ObjLine, &l);
module_insert(mod, e);
line_set( &l, pt[1], pt[2] );
e = element_init(ObjLine, &l);
module_insert(mod, e);
line_set( &l, pt[2], pt[0]);
e = element_init(ObjLine, &l);
module_insert(mod, e);
point_set3D( &pt[3], x1, 0.0, z1 );
point_set3D( &pt[4], x2, 0.0, z2 );
point_set3D( &pt[5], x2, 1.0, z2 );
point_set3D( &pt[6], x1, 1.0, z1 );
point_copy( &pt[7], &xtop);
line_set( &l, pt[0], pt[7] );
e = element_init(ObjLine, &l);
module_insert(mod, e);
line_set( &l, pt[1], pt[7] );
e = element_init(ObjLine, &l);
module_insert(mod, e);
line_set( &l, pt[2], pt[7]);
e = element_init(ObjLine, &l);
module_insert(mod, e);
line_set( &l, pt[3], pt[7]);
e = element_init(ObjLine, &l);
module_insert(mod, e);
}
}
polygon_clear( &p );
}
/*
* Adds a unit cube, axis-aligned and centered on zero to the Module.
* If solid is zero, add only lines. If solid is non-zero, use polygons.
* Make sure each polygon has surface normals defined for it.
*/
void module_cube(Module *md, int solid){
if(!md){
printf("Null md passed to module_cube\n");
return;
}
Element *e;
Polygon p;
Point v[8];
Point tv[4];
Line l;
int i;
// initialize polygon
polygon_init( &p );
// corners of a cube, centered at (0, 0, 0)
point_set3D( &v[0], -0.5, -0.5, -0.5 );
point_set3D( &v[1], 0.5, -0.5, -0.5 );
point_set3D( &v[2], 0.5, 0.5, -0.5 );
point_set3D( &v[3], -0.5, 0.5, -0.5 );
point_set3D( &v[4], -0.5, -0.5, 0.5 );
point_set3D( &v[5], 0.5, -0.5, 0.5 );
point_set3D( &v[6], 0.5, 0.5, 0.5 );
point_set3D( &v[7], -0.5, 0.5, 0.5 );
if(solid == 0){
// add only lines ( 12 of them )
// front face lines
for(i=0;i<3;i++){
line_set( &l, v[i], v[i+1] );
e = element_init(ObjLine, &l);
module_insert(md, e);
}
line_set( &l, v[3], v[0] );
e = element_init(ObjLine, &l);
module_insert(md, e);
// back face lines
for(i=4;i<7;i++){
line_set( &l, v[i], v[i+1] );
e = element_init(ObjLine, &l);
module_insert(md, e);
}
line_set( &l, v[7], v[4] );
e = element_init(ObjLine, &l);
module_insert(md, e);
// connecting lines
line_set( &l, v[2], v[6] );
e = element_init(ObjLine, &l);
module_insert(md, e);
line_set( &l, v[3], v[7] );
e = element_init(ObjLine, &l);
module_insert(md, e);
line_set( &l, v[0], v[4] );
e = element_init(ObjLine, &l);
module_insert(md, e);
line_set( &l, v[1], v[5] );
e = element_init(ObjLine, &l);
module_insert(md, e);
}
else{
// use polygons ( 6 of them )
// front side
polygon_set( &p, 4, &(v[0]) );
e = element_init(ObjPolygon, &p);
module_insert(md, e);
// back side
polygon_set( &p, 4, &(v[4]) );
e = element_init(ObjPolygon, &p);
module_insert(md, e);
// top side
point_copy( &tv[0], &v[2] );
point_copy( &tv[1], &v[3] );
point_copy( &tv[2], &v[7] );
point_copy( &tv[3], &v[6] );
polygon_set( &p, 4, tv );
e = element_init(ObjPolygon, &p);
module_insert(md, e);
// bottom side
point_copy( &tv[0], &v[0] );
point_copy( &tv[1], &v[1] );
point_copy( &tv[2], &v[5] );
point_copy( &tv[3], &v[4] );
polygon_set( &p, 4, tv );
e = element_init(ObjPolygon, &p);
module_insert(md, e);
// left side
point_copy( &tv[0], &v[0] );
point_copy( &tv[1], &v[3] );
point_copy( &tv[2], &v[7] );
point_copy( &tv[3], &v[4] );
polygon_set( &p, 4, tv );
e = element_init(ObjPolygon, &p);
module_insert(md, e);
// right side
point_copy( &tv[0], &v[1] );
point_copy( &tv[1], &v[2] );
point_copy( &tv[2], &v[6] );
point_copy( &tv[3], &v[5] );
polygon_set( &p, 4, tv );
e = element_init(ObjPolygon, &p);
module_insert(md, e);
}
// clean up
polygon_clear(&p);
}
/*
* use the de Casteljau algorithm to subdivide the Bezier surface divisions times,
* then draw either the lines connecting the control points, if solid is 0,
* or draw triangles connecting the surface.
*/
void module_bezierSurface(Module *m, BezierSurface *b, int divisions, int solid){
int i, j, k, l;
Line tempLine;
Point grid[7][7];
Point controls[7];
Point deCast[7];
Point surfacePoints[16];
BezierSurface tempBezSurf;
Polygon *temptri = polygon_create();
if(!m || !b){
printf("Null passed to module_bezierSurface\n");
return;
}
// base case
if(divisions == 0){
// lines
if(solid == 0){
for(i=0;i<4;i++){
for(j=0;j<3;j++){
line_set(&tempLine, b->c[i][j], b->c[i][j+1]);
module_line(m, &tempLine);
line_set(&tempLine, b->c[j][i], b->c[j+1][i]);
module_line(m, &tempLine);
}
}
}
// triangles
else {
controls[0] = b->c[0][0];
controls[1] = b->c[0][3];
controls[2] = b->c[3][3];
controls[3] = b->c[3][0];
controls[4] = b->c[0][0];
polygon_set(temptri, 3, &(controls[0]));
module_polygon(m, temptri);
polygon_set(temptri, 3, &(controls[2]));
module_polygon(m, temptri);
}
}
// divide and recurse
else {
// compute all avg points for 3 orders, down to just one point 3rd order
// do for each of the four bezier curves
for(i=0;i<4;i++){
deCasteljau(&(deCast[0]), &(b->c[i][0]));
for(j=0;j<7;j++){
grid[2*i][j] = deCast[j];
}
}
// now traverse the other direction, populating grid
for(i=0;i<7;i++){
for(j=0;j<4;j++){
controls[j] = grid[2*j][i];
}
deCasteljau(&(deCast[0]), &(controls[0]));
for(j=0;j<7;j++){
grid[j][i] = deCast[j];
}
}
// now make the four new bezier surfaces by subdividing across
for(i=0;i<2;i++){
for(j=0;j<2;j++){
for(k=0;k<4;k++){
for(l=0;l<4;l++){
surfacePoints[4*k+l] = grid[k+3*i][l+3*j];
}
}
bezierSurface_set(&tempBezSurf, &(surfacePoints[0]));
// recursive call
module_bezierSurface(m, &tempBezSurf, divisions-1, solid);
}
}
}
// clean up
polygon_free(temptri);
}
// makes 3 X-wing fighters in a loose formation
int main(int argc, char *argv[]) {
int i, j; //loop variables
Image *src;
Module* wall;
Module* ray;
Module* ray2;
Module *scene1;
Module* scene2;
Polygon p;
Line l;
Point point[4];
Point point2[2];
View3D view;
Matrix vtm, gtm;
DrawState *ds;
char filename[100];
Color Flame = { { 1.0, 0.7, 0.2 } };
Color Red = { { 1.0, 0.2, 0.1 } };
Color Grey = { { 0.745, 0.745, 0.745} };
Color Blue = {{0.117647, 0.564706, 1}};
// Color Grey = {{1, 1, 1}};
// set up the view
point_set3D( &(view.vrp), 4, 4, 4 );
vector_set( &(view.vpn), -view.vrp.val[0], -view.vrp.val[1], -view.vrp.val[2] );
vector_set( &(view.vup), 0, 1, 0 );
view.d = 1;
view.du = 1.6;
view.dv = 0.9;
view.f = 1;
view.b = 50;
view.screenx = 640;
view.screeny = 360;
matrix_setView3D( &vtm, &view );
matrix_identity( >m );
// //wall
wall = module_create();
module_color(wall, &Red);
polygon_init(&p);
point_set3D(&point[0], 1,1,2);
point_set3D(&point[1], 1,0,2);
point_set3D(&point[2], 0,0,2);
point_set3D(&point[3], 0,1,2);
polygon_set(&p, 4, &point[0]);
module_polygon(wall, &p);
//ray
ray = module_create();
module_color(ray, &Blue);
for(i=0; i< 5; i++){
point_set3D(&point2[0], -1+0.01*i, -1, 1);
point_set3D(&point2[1], 1+0.01*i, 1, 1);
line_set(&l, point2[0], point2[1]);
module_line(ray, &l);
}
//ray2
ray2 = module_create();
module_color(ray2, &Red);
for(i=0; i< 5; i++){
point_set3D(&point2[0], -1+0.01*i, 1, -1);
point_set3D(&point2[1], 1+0.01*i, -1, -1);
line_set(&l, point2[0], point2[1]);
// line_zBuffer(&l, 0);
module_line(ray2, &l);
}
//scene
// scene = module_create();
// module_module(scene, wall);
// module_module(scene, ray);
// module_module(scene, ray2);
// module_module(scene, wall);
for(i=0; i< 36; i++){
//scene
scene1 = module_create();
scene2 = module_create();
module_rotateZ(scene1, cos(i*10 * M_PI/180), sin(i*10 * M_PI/180));
module_scale( scene1, 3, 1, 2 );
module_color( scene1, &Blue );
module_cube( scene1, 1);
module_scale(scene2, 0.5, 0.5, 0.5);
module_cylinder(scene2, 30);
// create the image and drawstate
src = image_create( 360, 640 );
ds = drawstate_create();
drawstate_setAlpha(ds, 1);
ds->shade = ShadeDepth;
// draw into the scene
// module_draw( scene1, &vtm, >m, ds, src );
drawstate_setAlpha(ds, 1 );
module_draw( scene1, &vtm, >m, ds, src );
// write out the scene
sprintf(filename, "frame_%.2d.ppm", i);
image_write( src, filename );
module_delete( scene1);
}
//free the polygon data
// polygon_clear( &p );
// free the modules
// module_delete( scene);
// module_delete( wall );
// free the drawstate
free(ds);
// free the image
image_free( src );
return(0);
}
/*
Program to test polygon functionality using barycentric coordinates
*/
int main(int argc, char *argv[]) {
Image *src;
const int rows = 100;
const int cols = 100;
Polygon *p;
Color Red;
Color White;
Color Blue;
Point pt[100];
color_set(&Red, 0.9, 0.2, 0.1 );
color_set(&White, 1.0, 1.0, 1.0 );
color_set(&Blue, 0.2, 0.1, 0.95 );
src = image_create(rows, cols);
// make a simple square to test proper areas and locations
// the square ought to be 20x20, include pixel (30,30) and exclude pixel (50, 50)
point_set2D(&(pt[0]), 30, 30);
point_set2D(&(pt[1]), 50, 30);
point_set2D(&(pt[2]), 50, 50);
point_set2D(&(pt[3]), 30, 50);
point_set2D(&(pt[4]), 30, 30);
p = polygon_createp(3, pt);
printf("drawing polygon 1\n");
polygon_drawFillB(p, src, Blue);
polygon_set(p, 3, &(pt[2]) );
printf("drawing polygon 2\n");
polygon_drawFillB(p, src, Red);
point_set2D(&(pt[5]), 60, 20);
point_set2D(&(pt[6]), 80, 85);
point_set2D(&(pt[7]), 50, 70);
polygon_set(p, 3, &(pt[5]));
printf("drawing polygon 3\n");
polygon_drawFillB(p, src, White);
point_set2D(&(pt[8]), 5, 5);
point_set2D(&(pt[9]), 25, 5);
point_set2D(&(pt[10]), 25, 25);
point_set2D(&(pt[11]), 5, 25);
point_set2D(&(pt[12]), 5, 5);
polygon_set(p, 3, &(pt[10]) );
printf("drawing polygon 4\n");
polygon_drawFillB(p, src, Red);
polygon_set(p, 3, &(pt[8]));
printf("drawing polygon 5\n");
polygon_drawFillB(p, src, Blue);
printf("writing output\n");
image_write(src, "test4b.ppm");
image_free(src);
return(0);
}
/*
Program to test polygon functionality
*/
int main(int argc, char *argv[]) {
Image *src;
const int rows = 300;
const int cols = 400;
Polygon *p;
Color Red;
Color Orange;
Color White;
Color Blue;
Point pt[100];
int i;
srand(42);
color_set(&Red, 0.9, 0.2, 0.1 );
color_set(&Orange, 0.95, 0.7, 0.3 );
color_set(&White, 1.0, 1.0, 1.0 );
color_set(&Blue, 0.2, 0.1, 0.95 );
src = image_create(rows, cols);
// make a simple square to test proper areas and locations
// the square ought to be 20x20, include pixel (30,30) and exclude pixel (50, 50)
point_set2D(&(pt[0]), 30, 30);
point_set2D(&(pt[1]), 50, 30);
point_set2D(&(pt[2]), 50, 50);
point_set2D(&(pt[3]), 30, 50);
p = polygon_createp(4, pt);
printf("drawing a square\n");
polygon_drawFill(p, src, Blue);
// something more interesting
for(i=0;i<50;i++) {
float dr = rand() % 20;
point_set2D(&(pt[i]),
200 + cos((float)i * M_PI * 2.0 / 50.0)*(70 + dr),
150 + sin((float)i * M_PI * 2.0 / 50.0)*(70 + dr));
}
polygon_set(p, 50, pt);
printf("drawing first big polygon\n");
polygon_drawFill(p, src, Red);
for(i=0;i<50;i++) {
float dr = rand() % 15;
point_set2D(&(pt[i]),
200 + cos((float)i * M_PI * 2.0 / 50.0)*(50 + dr),
150 + sin((float)i * M_PI * 2.0 / 50.0)*(50 + dr));
}
polygon_set(p, 50, pt);
printf("drawing second big polygon\n");
polygon_drawFill(p, src, Orange);
for(i=0;i<50;i++) {
float dr = rand() % 10;
point_set2D(&(pt[i]),
200 + cos((float)i * M_PI * 2.0 / 50.0)*(30 + dr),
150 + sin((float)i * M_PI * 2.0 / 50.0)*(30 + dr));
}
polygon_set(p, 50, pt);
printf("drawing third big polygon\n");
polygon_drawFill(p, src, White);
printf("writing output\n");
image_write(src, "test4a.ppm");
image_free(src);
return(0);
}