From 0ea5fc66924303d1bf73ba283a383e2aadee02f2 Mon Sep 17 00:00:00 2001 From: neodarz Date: Sat, 11 Aug 2018 20:21:34 +0200 Subject: Initial commit --- docs/doxygen/nel/a02629.html | 165 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 165 insertions(+) create mode 100644 docs/doxygen/nel/a02629.html (limited to 'docs/doxygen/nel/a02629.html') diff --git a/docs/doxygen/nel/a02629.html b/docs/doxygen/nel/a02629.html new file mode 100644 index 00000000..65c8e892 --- /dev/null +++ b/docs/doxygen/nel/a02629.html @@ -0,0 +1,165 @@ + + +NeL: NL3D::CHeatHaze class Reference + + + +
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+

NL3D::CHeatHaze Class Reference

#include <heat_haze.h> +

+

Detailed Description

+This perform a heat haze effect at the horizon of the scene. This make use of 2d deformation of the frame buffer
Parameters:
+ + + +
width : viewport width
height : viewport height
+
+
Author:
Nicolas Vizerie

+Nevrax France

+
Date:
2001
+ +

+ +

+Definition at line 47 of file heat_haze.h. + + + + +

Static Public Member Functions

void performHeatHaze (uint width, uint height, CScene &s, IDriver *drv)
+

Member Function Documentation

+

+ + + + +
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
void NL3D::CHeatHaze::performHeatHaze ( uint  width,
uint  height,
CScene &  s,
IDriver *  drv
)  [static]
+
+ + + + + +
+   + + +

+ +

+Definition at line 51 of file heat_haze.cpp. +

+References NL3D::_SinWave, NLMISC::CPlane::a, NLMISC::CPlane::c, NLMISC::CPlane::d, height, NLMISC::CMatrix::inverted(), NLMISC::CPlane::make(), NLMISC::CVector::normalize(), s, NLMISC::CVector::set(), sint, uint, width, NLMISC::CVector::x, and NLMISC::CVector::z. +

+

00052         {
+00053                 NLMISC::CMatrix m  = s.getCam()->getMatrix();
+00054                 NLMISC::CMatrix im = m.inverted();
+00055 
+00056                 // compute the shape of the horizon
+00057 
+00058                 // first we compute the direction of the world up vector in the viewer basis.   
+00059                 NLMISC::CVector up = im * NLMISC::CVector::K;
+00060                 // project onto the I and K vectors
+00061                 float upNorm = (up.x * up.x + up.z * up.z);
+00062 
+00063                 const float threshold = 10E-4f;
+00064 
+00065                 if (upNorm < threshold) return; // the viewer is looking above or below  himlself
+00066 
+00067                 // Compute the right vector. This is done by intersecting the horizon plane with a near plane. 
+00068                 // to do this, we transform the horizon plane into the view basis.This may be optimized, but is not critical.
+00069                 //
+00070                 NLMISC::CPlane h;
+00071                 h.make(NLMISC::CVector::K, NLMISC::CVector::Null);
+00072 
+00073                 h = h * m; // note : this multiply by the transposition of m
+00074 
+00075                 // intersect with near plane : we got y = 0, which gives us, as a right vector :
+00076                 // if c is not 0, we got : x = 1 and z = (-a - d) / c as a working solution.
+00077                 // Else we got x = (- d - c )/ a and z = 1
+00078 
+00079 
+00080                 NLMISC::CVector right;
+00081 
+00082                 if (fabsf(h.c) > threshold)
+00083                 {
+00084                         right.set(1, 0, (h.a + h.d) / - h.c );
+00085                 }
+00086                 else
+00087                 {
+00088                         right.set( (h.d + h.c) / h.a, 0,  1);
+00089                 }
+00090 
+00091                 right.normalize();
+00092 
+00093                 // now, find a point on screen that lay on the horizon line
+00094                 static std::vector<NLMISC::CVector2f> poly(4);          
+00095 
+00096                 
+00097 
+00098                 const sint xCenter = width >> 1;
+00099                 const sint yCenter = height >> 1;
+00100 
+00101                 const float horizonHeight = (float) (height >> 2);
+00102                 const float horizonWidth  = (float) (width  >> 2);
+00103 
+00104                 NLMISC::CVector tmp ;
+00105 
+00106                 tmp = horizonWidth * right + horizonHeight * up;
+00107                 poly[0] = NLMISC::CVector2f(xCenter + tmp.x, yCenter + tmp.z) ;
+00108                 tmp = horizonWidth   * right - horizonHeight  * up;
+00109                 poly[1] = NLMISC::CVector2f(xCenter + tmp.x, yCenter + tmp.z) ;
+00110                 tmp = - horizonWidth   * right - horizonHeight  * up;
+00111                 poly[2] = NLMISC::CVector2f(xCenter + tmp.x, yCenter + tmp.z);
+00112                 tmp = - horizonWidth   * right + horizonHeight  * up;
+00113                 poly[3] = NLMISC::CVector2f(xCenter + tmp.x, yCenter + tmp.z);
+00114 
+00115 
+00116                 CDeform2d::doDeform(poly, drv, &_SinWave);
+00117 
+00118 
+00119 
+00120 
+00121         }
+
+

The documentation for this class was generated from the following files: +
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