文件列表:

在图像上建立光源\Geyser.jpg (17619, 2000-07-17)
在图像上建立光源\Light.exe (36864, 2000-07-19)
在图像上建立光源\Light.frm (13398, 2000-07-18)
在图像上建立光源\Light.frx (2470, 2000-07-18)
在图像上建立光源\Light.vbp (632, 2000-07-18)
在图像上建立光源\mdlLight.bas (3158, 2000-07-22)
在图像上建立光源\Planet Source Code.url (57, 2000-07-17)
在图像上建立光源 (0, 2005-10-24)

+---------------------------+ | DRAWLIGHT FUNCTION README | +---------------------------+ +-- INTRODUCTION: --+ "DrawLight" is a function that I wrote because I wanted to add lightning effects to my game, if it was possible. Guess what, it is -- and here's the proof! :) It might be too slow to do it in real time in games, but it could be pre-calculated when loading a level or something. It draws a light in any picture, but it's faster than most ways to achive this (because I used the circle's core equation instead of the Circle function). Also, it's highly customizable: you can change the coordinates where it will appear, the radius, and, most important, the brightness that will be added for the red, green and blue values. As a bonus, it draws the light like if it was growing, so maybe there's no need for using a backbuffer ;) It should teach you something about using equations with loops, messing with the RGB values of each pixel to get some nice effects, and how basic algorythms for graphics work. There's only a small problem: if you use it twice in the same image, and the lights "touch" each other, some weird colors appear... if you know how to solve it, please e-mail me. +-- INSTRUCTIONS: --+ Simply add the .bas file to your project to use it. All you need to do in order to activate the effect is to call this function. +-- USAGE: --+ DrawLight(Target As Long, X As Single, Y As Single, RedB As Byte, GreenB As Byte, BlueB As Byte, Radius As Integer, NumberOfSteps As Single) +-- ARGUMENTS: --+ +- Target: This is the hDC where the image will be drawn. (You'll find this as a property of forms and picture boxes. Just know that it refers to the image used in these controls.) +- X: The X coordinates of the place where the light will be drawn (referring to the center). +- Y: The Y coordinates of the place where the light will be drawn (referring to the center). +- RedB This is the brightness applied to the Red value. Be aware that high numbers will make the light totally white! +- GreenB The brightness applied to the Green value. +- BlueB The brightness applied to the Blue value. +- Radius: The radius of the light. +- NumberOfSteps The light is drawn in various steps (circles that apply different brightnesses to the background). The higher the steps, the smoother the light will appear, but too many steps make the process slower. +--EXAMPLE: --+ Check the sample project included for a working demo. But the .exe runs much faster than Visual Basic's Run Mode! +--------------------------+ | Made by Jotaf*** | | (Joo F. S. Henriques) | | | | E-mail me at | | jotaf***@hotmail.com | +--------------------------+

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