227 lines
8.0 KiB
Plaintext
227 lines
8.0 KiB
Plaintext
|
#version 120
|
||
|
|
/*
|
||
|
|
-----------------------------------------------------------------------------
|
||
|
|
This source file is part of OGRE
|
||
|
|
(Object-oriented Graphics Rendering Engine)
|
||
|
|
For the latest info, see http://www.ogre3d.org
|
||
|
|
|
||
|
|
Copyright (c) 2000-2012 Torus Knot Software Ltd
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
-----------------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Program Name: FFPLib_Lighting
|
||
|
|
// Program Desc: Lighting functions of the FFP.
|
||
|
|
// Program Type: Vertex shader
|
||
|
|
// Language: GLSL
|
||
|
|
// Notes: Implements core functions for FFPLighting class.
|
||
|
|
// based on lighting engine.
|
||
|
|
// See http://msdn.microsoft.com/en-us/library/bb147178.aspx
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void FFP_Light_Directional_Diffuse(in mat4 mWorldViewIT,
|
||
|
|
in vec3 vNormal,
|
||
|
|
in vec3 vNegLightDirView,
|
||
|
|
in vec3 vDiffuseColour,
|
||
|
|
in vec3 vBaseColour,
|
||
|
|
out vec3 vOut)
|
||
|
|
{
|
||
|
|
vec3 vNormalView = normalize((mWorldViewIT * vec4(vNormal.xyz, 1.0)).xyz);
|
||
|
|
float nDotL = dot(vNormalView, vNegLightDirView);
|
||
|
|
|
||
|
|
vOut = vBaseColour + vDiffuseColour * clamp(nDotL, 0.0, 1.0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void FFP_Light_Directional_DiffuseSpecular(in mat4 mWorldView,
|
||
|
|
in vec4 vPos,
|
||
|
|
in mat4 mWorldViewIT,
|
||
|
|
in vec3 vNormal,
|
||
|
|
in vec3 vNegLightDirView,
|
||
|
|
in vec3 vDiffuseColour,
|
||
|
|
in vec3 vSpecularColour,
|
||
|
|
in float fSpecularPower,
|
||
|
|
in vec3 vBaseDiffuseColour,
|
||
|
|
in vec3 vBaseSpecularColour,
|
||
|
|
out vec3 vOutDiffuse,
|
||
|
|
out vec3 vOutSpecular)
|
||
|
|
{
|
||
|
|
vOutDiffuse = vBaseDiffuseColour;
|
||
|
|
vOutSpecular = vBaseSpecularColour;
|
||
|
|
|
||
|
|
vec3 vNormalView = normalize((mWorldViewIT * vec4(vNormal.xyz, 1.0)).xyz);
|
||
|
|
float nDotL = dot(vNormalView, vNegLightDirView);
|
||
|
|
vec3 vView = -normalize((mWorldView* vPos).xyz);
|
||
|
|
vec3 vHalfWay = normalize(vView + vNegLightDirView);
|
||
|
|
float nDotH = dot(vNormalView, vHalfWay);
|
||
|
|
|
||
|
|
if (nDotL > 0.0)
|
||
|
|
{
|
||
|
|
vOutDiffuse += vDiffuseColour * nDotL;
|
||
|
|
vOutSpecular += vSpecularColour * pow(clamp(nDotH, 0.0, 1.0), fSpecularPower);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void FFP_Light_Point_Diffuse(in mat4 mWorldView,
|
||
|
|
in vec4 vPos,
|
||
|
|
in mat4 mWorldViewIT,
|
||
|
|
in vec3 vNormal,
|
||
|
|
in vec3 vLightPosView,
|
||
|
|
in vec4 vAttParams,
|
||
|
|
in vec3 vDiffuseColour,
|
||
|
|
in vec3 vBaseColour,
|
||
|
|
out vec3 vOut)
|
||
|
|
{
|
||
|
|
vOut = vBaseColour;
|
||
|
|
|
||
|
|
vec3 vViewPos = (mWorldView * vPos).xyz;
|
||
|
|
vec3 vLightView = vLightPosView - vViewPos;
|
||
|
|
float fLightD = length(vLightView);
|
||
|
|
vec3 vNormalView = normalize((mWorldViewIT * vec4(vNormal.xyz, 1.0)).xyz);
|
||
|
|
float nDotL = dot(vNormalView, normalize(vLightView));
|
||
|
|
|
||
|
|
if (nDotL > 0.0 && fLightD <= vAttParams.x)
|
||
|
|
{
|
||
|
|
float fAtten = 1.0 / (vAttParams.y + vAttParams.z*fLightD + vAttParams.w*fLightD*fLightD);
|
||
|
|
|
||
|
|
vOut += vDiffuseColour * nDotL * fAtten;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void FFP_Light_Point_DiffuseSpecular(in mat4 mWorldView,
|
||
|
|
in vec4 vPos,
|
||
|
|
in mat4 mWorldViewIT,
|
||
|
|
in vec3 vNormal,
|
||
|
|
in vec3 vLightPosView,
|
||
|
|
in vec4 vAttParams,
|
||
|
|
in vec3 vDiffuseColour,
|
||
|
|
in vec3 vSpecularColour,
|
||
|
|
in float fSpecularPower,
|
||
|
|
in vec3 vBaseDiffuseColour,
|
||
|
|
in vec3 vBaseSpecularColour,
|
||
|
|
out vec3 vOutDiffuse,
|
||
|
|
out vec3 vOutSpecular)
|
||
|
|
{
|
||
|
|
vOutDiffuse = vBaseDiffuseColour;
|
||
|
|
vOutSpecular = vBaseSpecularColour;
|
||
|
|
|
||
|
|
vec3 vViewPos = (mWorldView * vPos).xyz;
|
||
|
|
vec3 vLightView = vLightPosView - vViewPos;
|
||
|
|
float fLightD = length(vLightView);
|
||
|
|
|
||
|
|
vLightView = normalize(vLightView);
|
||
|
|
vec3 vNormalView = normalize((mWorldViewIT * vec4(vNormal.xyz, 1.0)).xyz);
|
||
|
|
float nDotL = dot(vNormalView, vLightView);
|
||
|
|
|
||
|
|
if (nDotL > 0.0 && fLightD <= vAttParams.x)
|
||
|
|
{
|
||
|
|
vec3 vView = -normalize(vViewPos);
|
||
|
|
vec3 vHalfWay = normalize(vView + vLightView);
|
||
|
|
float nDotH = dot(vNormalView, vHalfWay);
|
||
|
|
float fAtten = 1.0 / (vAttParams.y + vAttParams.z*fLightD + vAttParams.w*fLightD*fLightD);
|
||
|
|
|
||
|
|
vOutDiffuse += vDiffuseColour * nDotL * fAtten;
|
||
|
|
vOutSpecular += vSpecularColour * pow(clamp(nDotH, 0.0, 1.0), fSpecularPower) * fAtten;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void FFP_Light_Spot_Diffuse(in mat4 mWorldView,
|
||
|
|
in vec4 vPos,
|
||
|
|
in mat4 mWorldViewIT,
|
||
|
|
in vec3 vNormal,
|
||
|
|
in vec3 vLightPosView,
|
||
|
|
in vec3 vNegLightDirView,
|
||
|
|
in vec4 vAttParams,
|
||
|
|
in vec3 vSpotParams,
|
||
|
|
in vec3 vDiffuseColour,
|
||
|
|
in vec3 vBaseColour,
|
||
|
|
out vec3 vOut)
|
||
|
|
{
|
||
|
|
vOut = vBaseColour;
|
||
|
|
|
||
|
|
vec3 vViewPos = (mWorldView * vPos).xyz;
|
||
|
|
vec3 vLightView = vLightPosView - vViewPos;
|
||
|
|
float fLightD = length(vLightView);
|
||
|
|
vLightView = normalize(vLightView);
|
||
|
|
vec3 vNormalView = normalize((mWorldViewIT * vec4(vNormal.xyz, 1.0)).xyz);
|
||
|
|
float nDotL = dot(vNormalView, vLightView);
|
||
|
|
|
||
|
|
if (nDotL > 0.0 && fLightD <= vAttParams.x)
|
||
|
|
{
|
||
|
|
float fAtten = 1.0 / (vAttParams.y + vAttParams.z*fLightD + vAttParams.w*fLightD*fLightD);
|
||
|
|
float rho = dot(vNegLightDirView, vLightView);
|
||
|
|
float fSpotE = clamp((rho - vSpotParams.y) / (vSpotParams.x - vSpotParams.y), 0.0, 1.0);
|
||
|
|
float fSpotT = pow(fSpotE, vSpotParams.z);
|
||
|
|
|
||
|
|
vOut += vDiffuseColour * nDotL * fAtten * fSpotT;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
void FFP_Light_Spot_DiffuseSpecular(in mat4 mWorldView,
|
||
|
|
in vec4 vPos,
|
||
|
|
in mat4 mWorldViewIT,
|
||
|
|
in vec3 vNormal,
|
||
|
|
in vec3 vLightPosView,
|
||
|
|
in vec3 vNegLightDirView,
|
||
|
|
in vec4 vAttParams,
|
||
|
|
in vec3 vSpotParams,
|
||
|
|
in vec3 vDiffuseColour,
|
||
|
|
in vec3 vSpecularColour,
|
||
|
|
in float fSpecularPower,
|
||
|
|
in vec3 vBaseDiffuseColour,
|
||
|
|
in vec3 vBaseSpecularColour,
|
||
|
|
out vec3 vOutDiffuse,
|
||
|
|
out vec3 vOutSpecular)
|
||
|
|
{
|
||
|
|
vOutDiffuse = vBaseDiffuseColour;
|
||
|
|
vOutSpecular = vBaseSpecularColour;
|
||
|
|
|
||
|
|
vec3 vViewPos = (mWorldView * vPos).xyz;
|
||
|
|
vec3 vLightView = vLightPosView - vViewPos;
|
||
|
|
float fLightD = length(vLightView);
|
||
|
|
vLightView = normalize(vLightView);
|
||
|
|
vec3 vNormalView = normalize((mWorldViewIT * vec4(vNormal.xyz, 1.0)).xyz);
|
||
|
|
float nDotL = dot(vNormalView, vLightView);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
if (nDotL > 0.0 && fLightD <= vAttParams.x)
|
||
|
|
{
|
||
|
|
vec3 vView = -normalize(vViewPos);
|
||
|
|
vec3 vHalfWay = normalize(vView + vLightView);
|
||
|
|
float nDotH = dot(vNormalView, vHalfWay);
|
||
|
|
float fAtten = 1.0 / (vAttParams.y + vAttParams.z*fLightD + vAttParams.w*fLightD*fLightD);
|
||
|
|
float rho = dot(vNegLightDirView, vLightView);
|
||
|
|
float fSpotE = clamp((rho - vSpotParams.y) / (vSpotParams.x - vSpotParams.y), 0.0, 1.0);
|
||
|
|
float fSpotT = pow(fSpotE, vSpotParams.z);
|
||
|
|
|
||
|
|
vOutDiffuse += vDiffuseColour * nDotL * fAtten * fSpotT;
|
||
|
|
vOutSpecular += vSpecularColour * pow(clamp(nDotH, 0.0, 1.0), fSpecularPower) * fAtten * fSpotT;
|
||
|
|
}
|
||
|
|
}
|