jpt-archive/zengine
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

DrawClipped

Browse Source
This commit is contained in:
James Turk 2003-09-01 00:22:27 +00:00
parent 429ed5c43d
commit a9c641bc9d
2 changed files with 50 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
include/ZE_ZImage.h
View File

@ -13,7 +13,7 @@
\brief Definition file for ZImage.
Definition file for ZImage, the OpenGL version of the ZImage class for ZEngine.
<br>$Id: ZE_ZImage.h,v 1.22 2003/08/07 05:54:45 cozman Exp $<br>
<br>$Id: ZE_ZImage.h,v 1.23 2003/09/01 00:22:27 cozman Exp $<br>
\author James Turk
**/
@ -21,6 +21,7 @@
#define __ze_zimage_h__
#include "ZE_ZEngine.h"
#include "ZE_ZRect.h"
namespace ZE
{
@ -246,6 +247,17 @@ class ZImage
**/
void DrawRotated(float x, float y, float angle) const;
/*!
\brief Draw Clipped Image to screen.
Image is drawn such that only portions of image which fall within a certain area appear.
\since 0.8.5
\param x X coord to draw Image to.
\param y Y coord to draw Image to.
\param clipRect Rectangle to clip within.
**/
void DrawClipped(float x, float y, ZRect clipRect) const;
/*!
\brief Flip image over one or both axes.

38
src/ZE_ZImage.cpp
View File

@ -13,7 +13,7 @@
\brief Source file for ZImage.
Implementation of ZImage, the Image class for ZEngine.
<br>$Id: ZE_ZImage.cpp,v 1.41 2003/08/08 03:52:25 cozman Exp $<br>
<br>$Id: ZE_ZImage.cpp,v 1.42 2003/09/01 00:22:35 cozman Exp $<br>
\author James Turk
**/
@ -237,6 +237,42 @@ void ZImage::DrawRotated(float x, float y, float angle) const
glPopMatrix();
}
void ZImage::DrawClipped(float x, float y, ZRect clipRect) const
{
ZRect imgRect(x,y,rWidth,rHeight),inRect;
float xDiff,yDiff,nx,ny,nw,nh;
xDiff = rTexMaxX - rTexMinX;
yDiff = rTexMaxY - rTexMinY;
if(clipRect.Contains(imgRect))
{
Draw(x,y);
}
else if(clipRect.Intersects(imgRect))
{
inRect = clipRect.Intersection(imgRect);
nx = rTexMinX + (inRect.X()-imgRect.X())/imgRect.Width()*xDiff;
ny = rTexMinY + (inRect.Y()-imgRect.Y())/imgRect.Height()*yDiff;
nw = nx + (inRect.Width()/imgRect.Width())*xDiff;
nh = ny + (inRect.Height()/imgRect.Height())*yDiff;
glColor4ub(255,255,255,rAlpha); //sets the color correctly
Bind();
glBegin(GL_TRIANGLE_STRIP);
glTexCoord2f(nx,ny); glVertex2f(inRect.Left(),inRect.Top());
glTexCoord2f(nw,ny); glVertex2f(inRect.Right(),inRect.Top());
glTexCoord2f(nx,nh); glVertex2f(inRect.Left(),inRect.Bottom());
glTexCoord2f(nw,nh); glVertex2f(inRect.Right(),inRect.Bottom());
glEnd();
glColor4ub(255,255,255,255); //be responsible, return to standard color state
}
else //doesn't contain nor intersect
{
//draw nothing
}
}
void ZImage::Flip(bool horizontal, bool vertical)
{
GLfloat temp;