Vector3 Colorful::Shade(const HitInfo& hit, const Scene& scene) const {
const Ray& ray = hit.eyeRay;
const Vector3 viewDir = -ray.direction;
const std::vector<Light*>& lights = scene.GetLights();
Vector3 shadedColor(0.0f, 0.0f, 0.0f);
// Loop over all lights
std::vector<Light*>::const_iterator light_it = lights.begin();
for (light_it=lights.begin(); light_it != lights.end(); ++light_it) {
Light* light = *light_it;
Vector3 direction = light->GetPosition() - hit.point;
float distance2 = direction.Length2();
float falloff = light->Falloff(distance2);
direction.Normalize();
const float intensity = hit.normal.Dot(direction) * falloff * light->GetWattage() * math::INV_PI;
if( intensity > 0.0f ) {
Vector3 color = light->GetColor();
color *= intensity;
color = Vector3 ( (1-hit.texCoord.y)*(1-hit.texCoord.y),
hit.texCoord.x*hit.texCoord.x,
hit.texCoord.x );
shadedColor += color;
}
}
return shadedColor;
}
void LightPass::UpdateShader(Light& light)
{
glUniform3fv(m_lightColor_u, 1, glm::value_ptr(light.GetColor()));
glUniform1f(m_lightAmbientIntencity_u,light.GetAmbientIntencity());
glUniform1f(m_lightDiffuseIntencity_u, light.GetIntencity());
glUniform1f(m_constantAttenuation_u, light.GetAttenuationConstant());
glUniform1f(m_linearAttenuation_u, light.GetAttenuationLinear());
glUniform1f(m_expAttenuation_u, light.GetAttenuationExp());
glUniform1f(m_expAttenuation_u, light.GetAttenuationExp());
glUniform3fv(m_position_u, 1, glm::value_ptr((glm::vec3)(light.GetBoundingSphere()->transform.position)));
}
void LightWidget::InitComponent(Component* pComponent)
{
BaseComponentEditor::InitComponent(pComponent);
BeginInit();
Light* pLight = (Light*)pComponent;
if(pLight != NULL)
{
selColor->setColor(pLight->GetColor());
lblSpeInden->SetText(QString::number(pLight->GetSpecularIntensity()).toStdString().c_str());
cboLightType->setCurrentIndex((int)pLight->GetLightType());
}
EndInit();
}
//applying the light at the "stencil-approved" areas
void DefRenderer::LightPass(Camera *cam, Renderer *r)
{
//setting to pass the stencil test when != 0
glStencilFunc(GL_NOTEQUAL, 0, 0xFF);
//writing only on top of the colors from geometry pass
glDrawBuffer(GL_COLOR_ATTACHMENT0);
glDisable(GL_DEPTH_TEST);
//using additive blending to mix the light and scene fragments
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
//try to render from the back to preserve depth information
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
r->Ready();
mat4 model = r->GetParentGO()->GetModelMatrix();
mat4 mvp = cam->Get() * model;
r->GetProgram()->SetUniform("Model", value_ptr(model));
r->GetProgram()->SetUniform("MVP", value_ptr(mvp));
vec4 deviceCenter = vec4(mvp * vec4(0, 0, 0, 1)); //center in device coords
vec3 center(deviceCenter.x, deviceCenter.y, deviceCenter.z);
r->GetProgram()->SetUniform("Center", ¢er);
Light *l = r->GetParentGO()->GetLight();
float intensity = l->GetIntensity();
r->GetProgram()->SetUniform("Intensity", &intensity);
vec4 color = l->GetColor();
r->GetProgram()->SetUniform("Color", &color);
r->Render();
glCullFace(GL_BACK);
glDisable(GL_BLEND);
CHECK_GL_ERROR();
}
void
TerrainPatch::Illuminate(Color ambient, List<Light>& lights)
{
if (!model || model->NumVerts() < 1) return;
Surface* s = model->GetSurfaces().first();
if (!s) return;
illuminating = true;
// clear the solid lights to ambient:
VertexSet* vset = s->GetVertexSet();
int nverts = vset->nverts;
DWORD aval = ambient.Value();
for (int i = 0; i < nverts; i++) {
vset->diffuse[i] = aval;
}
TerrainRegion* trgn = terrain->GetRegion();
bool eclipsed = false;
bool first = terrain->IsFirstPatch(this);
if (trgn && !first) {
eclipsed = trgn->IsEclipsed();
}
// for sun and back lights:
ListIter<Light> iter = lights;
while (++iter) {
Light* light = iter.value();
if (!light->IsDirectional()) // only do sun and
continue; // back lights
if (light->CastsShadow() && first) {
eclipsed = light->Location().y < -100 || // has sun set, or
scene->IsLightObscured(vset->loc[0], // is sun in eclipse
light->Location(), // by orbital body
radius); // such as a moon?
}
if (!light->CastsShadow() || !eclipsed) {
Vec3 vl = light->Location();
vl.Normalize();
for (int i = 0; i < nverts; i++) {
Vec3& nrm = vset->nrm[i];
double val = 0;
double gain = vl * nrm;
if (gain > 0) {
val = light->Intensity() * (0.85 * gain);
if (val > 1)
val = 1;
}
if (val > 0.01)
vset->diffuse[i] = ((light->GetColor().dim(val)) + vset->diffuse[i]).Value();
}
}
}
// combine blend weights:
if (ndetail >= 2) {
for (int i = 0; i < nverts; i++) {
vset->diffuse[i] = vset->specular[i] | (vset->diffuse[i] & 0x00ffffff);
}
}
if (trgn && first) {
trgn->SetEclipsed(eclipsed);
}
InvalidateSurfaceData();
illuminating = false;
}
void GameObjectLightComponentWidget::InitFields()
{
Light* light = nullptr;
////////////////////////////////////////
// Set Ready to false, so Light cannot change
// properties while been initialized
m_IsReady = false;
////////////////////////////////////////
// Check Engine Viewer
AEAssert(m_EngineViewer != nullptr);
if (m_EngineViewer == nullptr)
{
return;
}
////////////////////////////////////////
// Verify LOC and Get Light Object
light = GetLight();
if(light == nullptr)
{
AETODO("Add log");
return;
}
////////////////////////////////////////
// Set Light Type
SetLightTypeComboBoxIndex(light->GetLightType());
////////////////////////////////////////
// Set Enabled
m_GameObjectLightComponentWidgetQtUI.m_Enabled->setChecked(light->IsEnabled());
////////////////////////////////////////
// Set Intensity
m_GameObjectLightComponentWidgetQtUI.m_IntensitySB->setValue(static_cast<double>(light->GetIntensity()));
////////////////////////////////////////
// Set Color
QColor qColor = AEQTHelpers::GetQColorFromColor(light->GetColor());
SetColorToColorWidget(qColor);
////////////////////////////////////////
// Set Near and Far Attenuation
m_GameObjectLightComponentWidgetQtUI.m_NearAttSB->setValue(static_cast<double>(light->GetNearAttenuation()));
m_GameObjectLightComponentWidgetQtUI.m_FarAttSB->setValue(static_cast<double>(light->GetFarAttenuation()));
////////////////////////////////////////
// Set Shadow Enabled
m_GameObjectLightComponentWidgetQtUI.m_ShadowEnabled->setChecked(light->IsShadowEnabled());
m_GameObjectLightComponentWidgetQtUI.m_DrawFrustum->setEnabled(light->IsShadowEnabled());
////////////////////////////////////////
// Enable/Visibility of Angle options
if(light->GetLightType() == LightType::Spot)
{
m_GameObjectLightComponentWidgetQtUI.m_LabelAngle->setVisible(true);
m_GameObjectLightComponentWidgetQtUI.m_LabelFalloffAngle->setVisible(true);
m_GameObjectLightComponentWidgetQtUI.m_AngleSB->setVisible(true);
m_GameObjectLightComponentWidgetQtUI.m_FalloffAngleSB->setVisible(true);
////////////////////////////////////////
// Get Spot Light
SpotLight* spotLight = reinterpret_cast<SpotLight*>(light);
////////////////////////////////////////
// Set Angle and Fall out Angle
m_GameObjectLightComponentWidgetQtUI.m_AngleSB->setValue(static_cast<double>(spotLight->GetAngle()));
m_GameObjectLightComponentWidgetQtUI.m_FalloffAngleSB->setValue(static_cast<double>(spotLight->GetFallOffAngle()));
}
else
{
m_GameObjectLightComponentWidgetQtUI.m_LabelAngle->setVisible(false);
m_GameObjectLightComponentWidgetQtUI.m_LabelFalloffAngle->setVisible(false);
m_GameObjectLightComponentWidgetQtUI.m_AngleSB->setVisible(false);
m_GameObjectLightComponentWidgetQtUI.m_FalloffAngleSB->setVisible(false);
}
////////////////////////////////////////
// Enable/Visibility of Draw Frustum Cascades
if (light->GetLightType() == LightType::Directional)
{
m_GameObjectLightComponentWidgetQtUI.m_DrawCascadeFrustums->setVisible(true);
}
else
{
m_GameObjectLightComponentWidgetQtUI.m_DrawCascadeFrustums->setVisible(false);
}
////////////////////////////////////////
// Light is Ready to change properties
m_IsReady = true;
}
void Shader::SetUniform(const string& name, const Light& value) {
SetUniform(name + ".color", value.GetColor());
SetUniform(name + ".ambientIntensity", value.GetAmbientIntensity());
SetUniform(name + ".diffuseIntensity", value.GetDiffuseIntensity());
}
void TerrainShader::LoadLight(Light& light, float ambientLight)
{
LoadVector(location_lightPosition, light.GetPosition());
LoadVector(location_lightColor, light.GetColor());
LoadFloat(location_ambientLight, ambientLight);
}
