OpenGL处理点云问题

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使用激光扫描仪扫描数据点，再使用OpenGL对点云进行处理，我自己写的程序显示效果（上）与激光扫描仪配套的处理软件的显示效果（下）如下图


我需要怎么做才能把显示效果跟下图显示一样呢，我是使用扫描仪的SDK获得点云的坐标和光强。获取点的API如下：
HRESULT getScanPoint([in] int scan, [in] int row, [in] int col, [out] double* x, [out] double* y, [out] double* z, [out] int* color, [out, retval] int* result)
Get the point at the given row/column in the given scan. The result is in the local cartesian coordinate system of the scanner. The returned color value depends on the selected reflection mode:
0. For grey scan points: Original reflection value of the scanner. In the case of
an FARO Laser Scanner this isin the range of 0 to 2047.
For color: the lightness of the color in the range 0 to 255.
1. For grey scan points: Mapped reflection value is in the range 0 (black) to
255 (white).
For color: the lightness of the color in the range 0 to 255.
2. For grey scan points: Mapped reflection value is in the range 0 (black) to
255 (white) as RGB grey value.
For color: RGB color, 8 bits per channel (bits 0-7: red, bits 8-15: green, bits
16-23: blue).
The default reflection mode is 1.
The scan number can be in the range 0 to numScans-1.
我是使用灰度扫描的，所以获取的color是一个灰度值，请问我怎么给一个点设置它的灰度值,我是一个新手，很多都不会，希望各位能帮一下，谢谢

[彩阳]

给一个点设置灰度值？那么在glColor3()中设定红、绿、蓝分量为同一值就行了。

[a56508820]

引用 1 楼 jiangcaiyang123 的回复:

给一个点设置灰度值？那么在glColor3()中设定红、绿、蓝分量为同一值就行了。

谢谢，你是对的，我之前没有留意浮点数的问题