RESULTS
1. Vertical Transitions
In this transition we move from image A to image B with vertical wipe from top to bottom. For time 0 we simply copy image A to image R. For time 1 we simply copy image B to image R. For time between 0 and 1, we will create different ROI for image A and B, and put it in image R. The ROI for image A are set from point(0,(r->height*t)) with width=r->width, and height=r->height-(r->height*t). The ROI for image B are set from point (0,0) with width=r->width(), and height=r->height*t. This definition of the ROI allows image A and B to have different height at different time, and therefore if we combine the results in image R we can have a transition that depend on the height of both source image at time t.
This is the initial condition before the transition.
Here is the vertical transition at time =0.5.
B image is inserted into the result image from the top of the image to the bottom.
Here is the final result after the transition. B image is now completely inside the result image.
View Source Code: VerticalWipe
2. Checker Wipe
This transition creates7 different ROI for the R image, which we will fill with image B. Image R is divided into 12 different region. For time 0, image A is set to image R. As time goes each ROI are filled with image B, and goes from with 0 to r->width/2. The tricky part is to define the 7th ROI, which is the second row and first column of the R image. This part of the image is not defined until all other region width reach (r->width/4). So we need to define the region when width of other regions =r->width/4.
Here is the checker wipe transition. Image A gets wipe out by image B in several different ROI.
3. Checker Board
This is somewhat has the same concept with checker wipe, but each ROI is defined with different time. When time =0.01. the first ROI is defined. As time goes, more and more ROI is defined. This ROI is filled with image B. Finally, image B will filled all ROI of image R.
View Source Code: CheckerBoard
4. Center Split
This implement transition that splits image A from the center of the R image, with the image B in between them. Finally, image A will go to the four corner of image R and disappear, leaving image B as the final result.
In order to implement this transition, we need to define four different ROI for image R that will be filled with image A. We need to have different variable that represent the movement of width and height of each ROI with respect to t.
We will call these variables xGap and yGap. So, xGap=t*r->width and yGap=t*r->height. The gap for each ROI is xHalfGap=xGap/2 and yHalfGap=yGap/2. Now, starting from the center of the image, define the four ROI using xGap, xHalfGap, yGap, and yHalfGap.
The left top corner ROI is starting from 0,0 , with the width= xHalf-xHalfGap , and height=yHalf-yHalfGap.
The right top corner ROI is starting from (xHalf+xHalfgap ),0, with the width= xHalf-xHalfGap , and height=yHalf-yHalfGap.
The left bottom corner ROI is starting from 0,(yHalf+yHalfGap) , with the width= xHalf-xHalfGap , and height=yHalf-yHalfGap.
The right bottom corner ROI is starting from (xHalf+xHalfgap ),(yHalf+yHalfGap), with the width= xHalf-xHalfGap , and height=yHalf-yHalfGap.
| Result2 |