void ColorFragment(MSR_FShaderParameters *params)
{
MSR_SSEColor3 &out = params->output;
const MSR_ShaderGlobals *globals = params->globals;
// Get the texture
MSR_SSEColor3 tex = MSR_Tex2D_Wrap(params->globals->tex0, params->varyings[0], params->varyings[1]);
// Depth
params->varyings[10] = _mm_rcp_ps( *params->varyings[10] );
params->varyings[8] *= params->varyings[10];
params->varyings[9] = SSE_ONE - (params->varyings[9] * params->varyings[10]);
MSR_SSEFloat shadow = MSR_Tex2D_F32(shadow_map_depth, params->varyings[8], params->varyings[9]);
// Assemble the light direction
const MSR_Vec4 &ld = params->globals->lights[0].direction;
MSR_SSEVec3 LightDir( MSR_SSEFloat(ld.x), MSR_SSEFloat(ld.y), MSR_SSEFloat(ld.z) );
params->varyings[10] += bias_amt;
float4 cmp = _mm_cmplt_ps(*shadow, *params->varyings[10]);
// Get the eye vector
MSR_SSEVec3 *Eye = (MSR_SSEVec3*)¶ms->varyings[2];
Eye->Normalize();
// Get the normal vector
MSR_SSEVec3 *Normal = (MSR_SSEVec3*)¶ms->varyings[5];
Normal->Normalize();
// Diffuse
MSR_SSEFloat diff = MSR_Clamp(Normal->Dot(LightDir), *SSE_ZERO, *SSE_ONE);
// Specular
MSR_SSEVec3 Reflect = ((diff * MSR_SSEFloat(2.0f)) * *Normal) - LightDir;
Reflect.Normalize();
MSR_SSEFloat spec = MSR_Clamp(Reflect.Dot(*Eye), *SSE_ZERO, *SSE_ONE);
spec = spec * spec * spec * spec * spec * spec * spec;
float4 cmp2 = _mm_cmpgt_ps( *diff, *SSE_ZERO );
cmp = _mm_and_ps( cmp2, cmp );
MSR_SSEFloat clamped_ao = MSR_Clamp( params->varyings[11], *SSE_ZERO, *SSE_ONE );
out.r = tex.r * clamped_ao;
out.g = tex.g * clamped_ao;
out.b = tex.b * clamped_ao;
MSR_SSEColor3 opt1, opt2;
opt1.r = globals->ml_ambient[0].r;
opt1.g = globals->ml_ambient[0].g;
opt1.b = globals->ml_ambient[0].b;
opt2.r = (diff * globals->ml_diffuse[0].r) + (spec * globals->ml_specular[0].r) + opt1.r;
opt2.g = (diff * globals->ml_diffuse[0].g) + (spec * globals->ml_specular[0].g) + opt1.g;
opt2.b = (diff * globals->ml_diffuse[0].b) + (spec * globals->ml_specular[0].b) + opt1.b;
out.r *= _mm_or_ps( _mm_and_ps(*opt2.r,cmp), _mm_andnot_ps(cmp, *opt1.r) );
out.g *= _mm_or_ps( _mm_and_ps(*opt2.g,cmp), _mm_andnot_ps(cmp, *opt1.g) );
out.b *= _mm_or_ps( _mm_and_ps(*opt2.b,cmp), _mm_andnot_ps(cmp, *opt1.b) );
}
void LightMapGenerator::CalculateSingleLight( ILightObject * l )
{
int rayCasts = NUMPHOTONS;
Vec3 RayOrigin;
Vec3 LightDir(0,0,-1);
//l->GetDirection( &LightDir.x );
l->GetPosition( RayOrigin );
Ray castRay;
castRay.m_Origin = Vec3( (float)RayOrigin[0], (float)RayOrigin[1], (float)RayOrigin[2] );
int bounces = NUMBOUNCES;
char buf[1024];
floatColor lightColor;
float fcolor[4];
l->GetColorIntensity(fcolor);
lightColor.a = fcolor[3];
lightColor.r = fcolor[0];
lightColor.g = fcolor[1];
lightColor.b = fcolor[2];
for( int i = 0; i < rayCasts; )
{
//random raycast
RandomRay( castRay.m_Direction );
//Check for spotlight
//Need to add angles to spotlights
float attenuationMultiplier = 1.f;
if( l->GetLightType() == SPOT_LIGHT )
{
float angledifference = castRay.m_Direction.Dot( LightDir );
if( angledifference < SPOT_LIGHT_ANGLE_ATTEN2 )
{
//cull out
continue;
}else if( angledifference < SPOT_LIGHT_ANGLE_ATTEN1 )
{
//fade a bit
float difference = SPOT_LIGHT_ANGLE_ATTEN1 - SPOT_LIGHT_ANGLE_ATTEN2;
float realDifference = SPOT_LIGHT_ANGLE_ATTEN1 - angledifference;
attenuationMultiplier = realDifference/difference;
float random = (float)( rand()%100 ) / 100.f;
if( random > attenuationMultiplier )//when it's fading has 100% chance of not going thruogh
{
continue;
}
}
}
if( ComputeRay( castRay, l, bounces, l->GetIntensity(), bounces, lightColor ) )
{
if( i%1000 == 0 )
{
sprintf( buf, "Calculating Photon %dx1000\n", i/1000 );
OutputDebugString( buf );
}
}
i++;
}
OutputDebugString( "DAMN IT\n" );
}
void
CWorld::vUpdateBeforeChildren( unsigned long in_Time )
{
CRenderProxy::getInstance().SetCamera(
CRenderSection_SetCamera( m_CamOrg, m_CamDir, m_CamRight,
m_FOVX, m_FOVY,
m_ZNear, m_ZFar
)
);
#define LIGHT_ROTATE_MILISECONDS 10000
#define LIGHT_ROTATE_RADIUS 10.0f
#define LIGHT_ROTATE_DISTANCE 10.0f
unsigned long T = in_Time%LIGHT_ROTATE_MILISECONDS;
float Angle = CONST_2PI*float(T)/float(LIGHT_ROTATE_MILISECONDS);
CVector LightOrg( LIGHT_ROTATE_RADIUS*cos(Angle), LIGHT_ROTATE_RADIUS*sin(Angle), LIGHT_ROTATE_DISTANCE );
CVector LightDir( -LightOrg ); LightDir.Normalize();
CRenderProxy::getInstance().SetDirectionalLight(LightDir,1.0f,1.0f,1.0f);
CRenderProxy::getInstance().SetAmbient(0x808080);
}
bool LightMapGenerator::ComputeDirectLightAtPoint( Vec3 &tcoord, Vec3 &normal, floatColor &outDirect,
ILightObject * light, floatColor &color)
{
POTENTIAL_INTERSECTION_SORT sortedIntersections;
Vec3 RayOrigin;
Vec3 LightDir( 0,0, -1 );
Vec3 Normals[ 3 ];
float attenuationDistance = light->GetAttenuationDistance();
light->GetPosition( RayOrigin );
Ray castRay;
double u, v, t;
MeshParameterization * mesh = NULL;
castRay.m_Origin = Vec3( (float)RayOrigin[0], (float)RayOrigin[1], (float)RayOrigin[2] );
castRay.m_Direction = tcoord - castRay.m_Origin;
float distanceFromLight = castRay.m_Direction.Length();
castRay.m_Direction.Normalize();
LightDir.Normalize();
//Check for spotlight
//Need to add angles to spotlights
float attenuationMultiplier = 1.f;
if( light->GetLightType() == SPOT_LIGHT )
{
float angledifference = castRay.m_Direction.Dot( LightDir );
if( angledifference < SPOT_LIGHT_ANGLE_ATTEN2 )
{
//cull out
return false;
}else if( angledifference < SPOT_LIGHT_ANGLE_ATTEN1 )
{
//fade a bit
float difference = SPOT_LIGHT_ANGLE_ATTEN1 - SPOT_LIGHT_ANGLE_ATTEN2;
float realDifference = SPOT_LIGHT_ANGLE_ATTEN1 - angledifference;
attenuationMultiplier = 1.f - realDifference/difference;
}
}
if( distanceFromLight < attenuationDistance )
{
IntersectWithWorld( castRay, sortedIntersections);
}
if( sortedIntersections.size() > 0 )
{
POTENTIAL_INTERSECTION_SORT::iterator iter = sortedIntersections.begin();
PotentialIntersection &firstIntersection = iter->second;
if( firstIntersection.t < (distanceFromLight - SHADOW_EPSILON )
|| firstIntersection.t > (distanceFromLight + SHADOW_EPSILON ) )//shadow
{
outDirect.a = 1;
//outDirect.r = 0;
//outDirect.g = 0;
//outDirect.b = 1;
#if 0
//draw all mesh polygons
static CHashString h(_T("none"));
if( (rand()%40) == 0 )
{
ADDLINEPARAMS LineParam;
LineParam.name = &h;
//LineParam.start = last;
//LineParam.end = transformed;
//LineParam.start = tcoord;
//LineParam.end = tcoord + normal*40;
LineParam.start = castRay.m_Origin;
LineParam.end = castRay.m_Origin + castRay.m_Direction*distanceFromLight;
LineParam.blue = 0;
LineParam.green = 0;
static DWORD msgHash_AddLine = CHashString(_T("AddLine")).GetUniqueID();
EngineGetToolBox()->SendMessage(msgHash_AddLine,sizeof(LineParam), &LineParam );
LineParam.start = castRay.m_Origin;
LineParam.end = castRay.m_Origin + castRay.m_Direction*(float)firstIntersection.t;
LineParam.blue = 1;
LineParam.green = 0;
LineParam.red = 0;
EngineGetToolBox()->SendMessage(msgHash_AddLine,sizeof(LineParam), &LineParam );
}
#endif
return false;
}
u = firstIntersection.u;
v = firstIntersection.v;
t = firstIntersection.t;
int face = firstIntersection.faceIndex;
mesh = firstIntersection.mesh;
Ray rRay = castRay;
TriangleFace &tri = (*mesh->m_Faces)[ face ];
//we intersected, find point of intersection, find texel it maps to, color
for( int a = 0; a < 3; a++ )
{
Normals[ a ] = (*mesh->m_CollapsedMesh)[ tri.index [ a ] ].normal;
}
Normals[ 0 ] = normal;
Normals[ 0 ].Normalize();
//now take the dot with light ray
float value = Normals[ 0 ].Dot( -rRay.m_Direction );
//write to KD Tree
//attenuate value based on distance
float intensity = 1.f - ((float)t / attenuationDistance);
if( intensity > 1.f )
{
intensity = 1.f;
}
else
if( intensity < 0 )
{
intensity = 0;
}
value *= intensity;
if( value <= 0.f )
{
outDirect.a = 1;
//outDirect.r = 1;
//outDirect.g = 0;
//outDirect.b = 0;
return false;
}
else if( value > 1.f )
{
value = 1.f;
}
//linearly interpolate the color based on distance
floatColor OutColor;
float fogFactor = ( (float)t - m_FogStart ) / ( m_FogEnd - m_FogStart );
if( fogFactor < 0 )
{
fogFactor = 0.f;
}
else
if( fogFactor > 1.f )
{
fogFactor = 1.f;
}
OutColor.r = m_FogColor.r*fogFactor + color.r*(1.f - fogFactor );
OutColor.g = m_FogColor.g*fogFactor + color.g*(1.f - fogFactor );
OutColor.b = m_FogColor.b*fogFactor + color.b*(1.f - fogFactor );
value *= color.a*attenuationMultiplier; //light intensity
if( outDirect.a < 0 )
{
outDirect.a = 1;
outDirect.r = value*OutColor.r;
outDirect.g = value*OutColor.g;
outDirect.b = value*OutColor.b;
}else
{
outDirect.r += value*OutColor.r;
outDirect.g += value*OutColor.g;
outDirect.b += value*OutColor.b;
}
return true;
}
else
{
//DEBUG green for missed intersections
//outDirect.a = 1.f;
//outDirect.r = 0.f;
//outDirect.g = 1.f;
//outDirect.b = 0.f;
}
return false;
}
