/**
* @brief Blits a sprite interpolating, position is relative to the player.
*
* Since position is in "game coordinates" it is subject to all
* sorts of position transformations.
*
* Interpolation is: sa*inter + sb*1.-inter)
*
* @param sa Sprite A to blit.
* @param sb Sprite B to blit.
* @param inter Amount to interpolate.
* @param bx X position of the texture relative to the player.
* @param by Y position of the texture relative to the player.
* @param sx X position of the sprite to use.
* @param sy Y position of the sprite to use.
* @param c Colour to use (modifies texture colour).
*/
void gl_blitSpriteInterpolateScale( const glTexture* sa, const glTexture *sb,
double inter, const double bx, const double by,
double scalew, double scaleh,
const int sx, const int sy, const glColour *c )
{
double x,y, w,h, tx,ty, z;
/* Translate coords. */
gl_gameToScreenCoords( &x, &y, bx - scalew * sa->sw/2., by - scaleh * sa->sh/2. );
/* Scaled sprite dimensions. */
z = cam_getZoom();
w = sa->sw*z*scalew;
h = sa->sh*z*scaleh;
/* check if inbounds */
if ((x < -w) || (x > SCREEN_W+w) ||
(y < -h) || (y > SCREEN_H+h))
return;
/* texture coords */
tx = sa->sw*(double)(sx)/sa->rw;
ty = sa->sh*(sa->sy-(double)sy-1)/sa->rh;
gl_blitTextureInterpolate( sa, sb, inter, x, y, w, h,
tx, ty, sa->srw, sa->srh, c );
}
/**
* @brief Blits a sprite interpolating, position is relative to the player.
*
* Since position is in "game coordinates" it is subject to all
* sorts of position transformations.
*
* Interpolation is: sa*inter + sb*1.-inter)
*
* @param sa Sprite A to blit.
* @param sb Sprite B to blit.
* @param inter Amount to interpolate.
* @param bx X position of the texture relative to the player.
* @param by Y position of the texture relative to the player.
* @param sx X position of the sprite to use.
* @param sy Y position of the sprite to use.
* @param c Colour to use (modifies texture colour).
*/
void gl_blitSpriteInterpolate( const glTexture* sa, const glTexture *sb,
double inter, const double bx, const double by,
const int sx, const int sy, const glColour *c )
{
double x,y, w,h, tx,ty, cx,cy, gx,gy;
/* Get parameters. */
gl_cameraGet( &cx, &cy );
gui_getOffset( &gx, &gy );
/* calculate position - we'll use relative coords to player */
x = (bx - cx - sa->sw/2. + gx) * gl_cameraZ;
y = (by - cy - sa->sh/2. + gy) * gl_cameraZ;
/* Scaled sprite dimensions. */
w = sa->sw*gl_cameraZ;
h = sa->sh*gl_cameraZ;
/* check if inbounds */
if ((fabs(x) > SCREEN_W/2 + w) ||
(fabs(y) > SCREEN_H/2 + h) )
return;
/* texture coords */
tx = sa->sw*(double)(sx)/sa->rw;
ty = sa->sh*(sa->sy-(double)sy-1)/sa->rh;
gl_blitTextureInterpolate( sa, sb, inter, x, y, w, h,
tx, ty, sa->srw, sa->srh, c );
}
