X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSDL%2FGame%2FRect.pm;h=a552f756c7962950a0f7b6aa62472bc5976b52d5;hb=50d0e9aca27e76457937927dd6ead320674bbe22;hp=b3070d74e260f542fdb2a26ed3f3c5ccb19c5ca9;hpb=71854fd9905f17049619e6738b2a97b2cd39dca2;p=sdlgit%2FSDL_perl.git

diff --git a/lib/SDL/Game/Rect.pm b/lib/SDL/Game/Rect.pm
index b3070d7..a552f75 100644
--- a/lib/SDL/Game/Rect.pm
+++ b/lib/SDL/Game/Rect.pm
@@ -512,6 +512,126 @@ sub unionall_ip {
     return;
 }
 
+sub _check_fit {
+    my ($self, $rect) = (@_);
+    
+    my $x_ratio = $self->w / $rect->w;
+    my $y_ratio = $self->h / $rect->h;
+    my $max_ratio = ($x_ratio > $y_ratio) ? $x_ratio : $y_ratio;
+
+    my $w = int ($self->w / $max_ratio);
+    my $h = int ($self->h / $max_ratio);
+
+    my $x = $rect->x + int (($rect->w - $w) / 2);
+    my $y = $rect->y + int (($rect->h - $h) / 2);
+    
+    return ($x, $y, $w, $h);
+}
+
+sub fit {
+    my ($self, $rect) = (@_);
+    
+    unless ($rect->isa('SDL::Rect')) {
+        croak "must receive an SDL::Rect-based object";
+    }
+
+    my ($x, $y, $w, $h) = _check_fit($self, $rect);
+    
+    return $self->new ($x, $y, $w, $h);
+}
+
+sub fit_ip {
+    my ($self, $rect) = (@_);
+    
+    unless ($rect->isa('SDL::Rect')) {
+        croak "must receive an SDL::Rect-based object";
+    }
+
+    my ($x, $y, $w, $h) = _check_fit($self, $rect);
+    
+    $self->x($x);
+    $self->y($y);
+    $self->w($w);
+    $self->h($h);
+    
+    return;
+}
+
+sub normalize {
+    my $self = shift;
+    
+    if ($self->w < 0) {
+        $self->x($self->x + $self->w);
+        $self->w(-$self->w);
+    }
+    
+    if ($self->h < 0) {
+        $self->y( $self->y + $self->h);
+        $self->h(-$self->h);
+    }
+    return;
+}
+
+sub contains {
+    my ($self, $rect) = (@_);
+    
+    unless ($rect->isa('SDL::Rect')) {
+        croak "must receive an SDL::Rect-based object";
+    }
+    
+    my $contained = ($self->x <= $rect->x) 
+                 && ($self->y <= $rect->y) 
+                 && ($self->x + $self->w >= $rect->x + $rect->w) 
+                 && ($self->y + $self->h >= $rect->y + $rect->h) 
+                 && ($self->x + $self->w > $rect->x) 
+                 && ($self->y + $self->h > $rect->y)
+                 ;
+                 
+    return $contained;
+}
+
+sub collidepoint {
+    my ($self, $x, $y) = (@_);
+
+    unless (defined $x and defined $y) {
+        croak "must receive (x,y) as arguments";
+    }
+    
+    my $inside = $x >= $self->x 
+              && $x < $self->x + $self->w 
+              && $y >= $self->y 
+              && $y < $self->y + $self->h
+              ;
+
+    return $inside;
+}
+
+sub _do_rects_intersect {
+    my ($rect_A, $rect_B) = (@_);
+    
+    return (
+               ($rect_A->x >= $rect_B->x && $rect_A->x < $rect_B->x + $rect_B->w)  
+            || ($rect_B->x >= $rect_A->x && $rect_B->x < $rect_A->x + $rect_A->w)
+           ) 
+           &&
+           (
+               ($rect_A->y >= $rect_B->y && $rect_A->y < $rect_B->y + $rect_B->h)
+            || ($rect_B->y >= $rect_A->y && $rect_B->y < $rect_A->y + $rect_A->h)
+           )
+           ;
+}
+
+
+sub colliderect {
+    my ($self, $rect) = (@_);
+
+    unless ($rect->isa('SDL::Rect')) {
+        croak "must receive an SDL::Rect-based object";
+    }
+    
+    return _do_rects_intersect($self, $rect);
+}
+
 
 42;
 __END__