Image programming in actionscript3 games)

3.2.2 high-strength oblique angle simulation so-called "carving clear"

Many ActionScript books or online tutorials like to use high-intensity parameters as an example to illustrate the implementation of carving clarity when introducing corner filters (Figure 3.38 ).

 

Figure 3.38 clear carving with a high-intensity oblique Filter

In fact, this practice cannot withstand scrutiny. First, there is no division between the two glossy surfaces and the two dark surfaces. Second, the image in the instance is a rectangle. If you replace it with the text of a complex outline, this so-called clarity seems abrupt (Figure 3.39 ).

 

Figure 3.39 clear letter carved with Flash Simulation o

The effect of Photoshop on these two details is far better than that of Flash (Figure 3.40, figure 3.41 ).
 

Figure 3.40 use PS to draw clearly carved squares

 

 

Figure 3.41 carved clear letters in Photoshop

In addition, for non-45 degrees angle, the demarcation points in Flash may even be distorted (Figure 3.42 ).

 

Figure 3.42 60-degree angle of Flash

If the height of the clearly carved slope is small, or the shape is not complex, the high-strength oblique angle is generally competent. However, if the height is large and such details must be improved, it will be more difficult, but here I can first give a relatively simple solution.

For a square, an angle filter can only generate a line at most two inflection points, either left and right (Figure 3.43), or right and left (Figure 3.44 ).

 

 

Figure 3.43 135 degrees, demarcation points on the left and bottom right
 

Figure 3.44 45 degrees, demarcation points on the right and bottom left

In the same filter, two angles cannot coexist, but we can assign two filters to the Display object (as mentioned in the last two sections, in the same Display object, you can set multiple filters of the same type.

 

We apply the two oblique filters to the square, and set the highlight and shadow transparency of the upper filter (that is, the one added later) to 50%, as shown in Figure 3.45.

 

Tip: You can use the copy filter method to quickly generate two identical filters, and then change the angle and alpha of one of them.

Figure 3.45 use two oblique filters to simulate higher accuracy of carving

Although we still cannot accurately control the color of each face, this action at least gives us a clear path, and the delicate carving is clearly accurate to the simulation in flash. For complex graphics, we can copy more layers, and then use the mixed mode and other knowledge to achieve precise control of Embossed colors. I will discuss these content one by one in subsequent chapters.

 

 

Image programming in actionscript3 games)