• Modern OpenGL 06 – Diffuse Point Lighting
• Diffuse Reflection
• https://en.wikipedia.org/wiki/Heightmap
• https://stackoverflow.com/questions/5281261/generating-a-normal-map-from-a-height-map
• Is it possible generate normal map from heightmap texture from math point of view?
• Lighting and Shadows
• Fast way to calculate heightmap normals
• Workshop 2 - Diffuse Lighting
• Tutorial 2: Bitmap Height Maps

self-shadowing

• https://en.wikipedia.org/wiki/Self-shadowing
• Real-Time Heightmap Self-Shadowing Using the Strider Technique
• Fast Computation of Terrain Shadow Maps
• 地形阴影贴图快速计算

BMP

• https://stackoverflow.com/questions/19650129/using-a-bmp-as-heightmap-how-to-access-pixel-color-to-set-up-heights
• Tutorial 2: Height Maps
• https://stackoverflow.com/questions/16408498/reading-in-a-bmp-heightmap
• BITMAPFILEHEADER、BITMAPINFOHEADER及BMP结构详解
• https://zh.wikipedia.org/wiki/BMP
• 位图文件（BMP）格式以及Linux下C程序实现
• Bitmap loader C++
• sample code for generate a bitmap image at x86_64 GNU/Linux
• what is the difference between bisizeimage , bisize and bfsize?
• Creating and writing to a bitmap
• 对BITMAPFILEHEADER中bfOffBits的理解
• Read And Write Bitmap