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69 lines
2.9 KiB
Text
Executable file
69 lines
2.9 KiB
Text
Executable file
<@include gpu/Config.slh@>
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<$VERSION_HEADER$>
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//
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// For licensing information, see http://http.developer.nvidia.com/GPUGems/gpugems_app01.html:
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//
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// NVIDIA Statement on the Software
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//
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// The source code provided is freely distributable, so long as the NVIDIA header remains unaltered and user modifications are
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// detailed.
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//
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// No Warranty
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//
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// THE SOFTWARE AND ANY OTHER MATERIALS PROVIDED BY NVIDIA ON THE ENCLOSED CD-ROM ARE PROVIDED "AS IS." NVIDIA DISCLAIMS ALL
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// WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF TITLE, MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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//
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// Limitation of Liability
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//
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// NVIDIA SHALL NOT BE LIABLE TO ANY USER, DEVELOPER, DEVELOPER'S CUSTOMERS, OR ANY OTHER PERSON OR ENTITY CLAIMING THROUGH OR
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// UNDER DEVELOPER FOR ANY LOSS OF PROFITS, INCOME, SAVINGS, OR ANY OTHER CONSEQUENTIAL, INCIDENTAL, SPECIAL, PUNITIVE, DIRECT
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// OR INDIRECT DAMAGES (WHETHER IN AN ACTION IN CONTRACT, TORT OR BASED ON A WARRANTY), EVEN IF NVIDIA HAS BEEN ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS SHALL APPLY NOTWITHSTANDING ANY FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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// LIMITED REMEDY. IN NO EVENT SHALL NVIDIA'S AGGREGATE LIABILITY TO DEVELOPER OR ANY OTHER PERSON OR ENTITY CLAIMING THROUGH
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// OR UNDER DEVELOPER EXCEED THE AMOUNT OF MONEY ACTUALLY PAID BY DEVELOPER TO NVIDIA FOR THE SOFTWARE OR ANY OTHER MATERIALS.
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//
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//
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// Atmospheric scattering vertex shader
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//
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// Author: Sean O'Neil
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//
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// Copyright (c) 2004 Sean O'Neil
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//
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<@include gpu/Inputs.slh@>
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<@include gpu/Transform.slh@>
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<$declareStandardTransform()$>
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uniform vec3 v3CameraPos; // The camera's current position
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uniform vec3 v3LightPos; // The direction vector to the light source
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uniform vec3 v3InvWavelength; // 1 / pow(wavelength, 4) for the red, green, and blue channels
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uniform float fOuterRadius; // The outer (atmosphere) radius
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uniform float fInnerRadius; // The inner (planetary) radius
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uniform float fKrESun; // Kr * ESun
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uniform float fKmESun; // Km * ESun
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uniform float fKr4PI; // Kr * 4 * PI
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uniform float fKm4PI; // Km * 4 * PI
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uniform float fScale; // 1 / (fOuterRadius - fInnerRadius)
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uniform float fScaleDepth; // The scale depth (i.e. the altitude at which the atmosphere's average density is found)
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uniform float fScaleOverScaleDepth; // fScale / fScaleDepth
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const int nSamples = 2;
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const float fSamples = 2.0;
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out vec3 position;
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void main(void)
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{
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// Get the ray from the camera to the vertex, and its length (which is the far point of the ray passing through the atmosphere)
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position = inPosition.xyz * fOuterRadius;
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// standard transform
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TransformCamera cam = getTransformCamera();
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TransformObject obj = getTransformObject();
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vec4 v4pos = vec4(position, 1.0);
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<$transformModelToClipPos(cam, obj, v4pos, gl_Position)$>
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}
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