void SoftwareRendererImp::draw_rect( Rect& rect ) {
Color c;
// draw as two triangles
float x = rect.position.x;
float y = rect.position.y;
float w = rect.dimension.x;
float h = rect.dimension.y;
Vector2D p0 = transform(Vector2D( x , y ));
Vector2D p1 = transform(Vector2D( x + w , y ));
Vector2D p2 = transform(Vector2D( x , y + h ));
Vector2D p3 = transform(Vector2D( x + w , y + h ));
// draw fill
c = rect.style.fillColor;
if (c.a != 0 ) {
rasterize_triangle( p0.x, p0.y, p1.x, p1.y, p2.x, p2.y, c );
rasterize_triangle( p2.x, p2.y, p1.x, p1.y, p3.x, p3.y, c );
}
// draw outline
c = rect.style.strokeColor;
if( c.a != 0 ) {
rasterize_line( p0.x, p0.y, p1.x, p1.y, c );
rasterize_line( p1.x, p1.y, p3.x, p3.y, c );
rasterize_line( p3.x, p3.y, p2.x, p2.y, c );
rasterize_line( p2.x, p2.y, p0.x, p0.y, c );
}
}
void SoftwareRendererImp::draw_polygon(Polygon& polygon) {
Color c;
// draw fill
c = polygon.style.fillColor;
if (c.a != 0) {
// triangulate
vector < Vector2D > triangles;
triangulate(polygon, triangles);
// draw as triangles
for (size_t i = 0; i < triangles.size(); i += 3) {
Vector2D p0 = transform(triangles[i + 0]);
Vector2D p1 = transform(triangles[i + 1]);
Vector2D p2 = transform(triangles[i + 2]);
rasterize_triangle(p0.x, p0.y, p1.x, p1.y, p2.x, p2.y, c);
}
}
// draw outline
c = polygon.style.strokeColor;
if (c.a != 0) {
int nPoints = polygon.points.size();
for (int i = 0; i < nPoints; i++) {
Vector2D p0 = transform(polygon.points[(i + 0) % nPoints]);
Vector2D p1 = transform(polygon.points[(i + 1) % nPoints]);
rasterize_line(p0.x, p0.y, p1.x, p1.y, c);
}
}
}
void SoftwareRendererImp::draw_polygon( Polygon& polygon ) {
Color c;
std::cout << polygon.transform << std::endl;
// draw fill
c = polygon.style.fillColor;
if( c.a != 0 ) {
// triangulate
vector<Vector2D> triangles;
triangulate( polygon, triangles );
// draw as triangles
for (size_t i = 0; i < triangles.size(); i += 3) {
Vector2D p0 = transform(triangles[i + 0]);
Vector2D p1 = transform(triangles[i + 1]);
Vector2D p2 = transform(triangles[i + 2]);
//for debug
/*
if (p0.x <= 400 && p0.y <= 200) {
printf("upper left polygon: (%f, %f, %f, %f, %f, %f)\n", p0.x, p0.y, p1.x, p1.y, p2.x, p2.y);
}
*/
rasterize_triangle( p0.x, p0.y, p1.x, p1.y, p2.x, p2.y, c );
}
}
// draw outline
c = polygon.style.strokeColor;
if( c.a != 0 ) {
int nPoints = polygon.points.size();
for( int i = 0; i < nPoints; i++ ) {
Vector2D p0 = transform(polygon.points[(i+0) % nPoints]);
Vector2D p1 = transform(polygon.points[(i+1) % nPoints]);
rasterize_line( p0.x, p0.y, p1.x, p1.y, c );
}
}
}
