// ===================
// Point lights
// ===================
void World::DoLightingPass(const PointLight& l)
{
gbuffer.StartLightingPass();
// Disable depth test.
glDisable(GL_DEPTH_TEST);
// Setup for lighting pass.
glStencilFunc(GL_NOTEQUAL, 0, 0xFF);
glEnable(GL_BLEND);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
// Bind pass 2 shader.
Shader* lpassShader = &pointLightShader;
Shader::Bind(lpassShader);
// Activate gbuffer textures.
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, gbuffer.GetColorID());
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, gbuffer.GetNormalID());
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, gbuffer.GetPositionID());
// Matrices
Matrix pmat = cam.GetProjectionMatrix();
Matrix vmat = cam.GetViewMatrix();
lpassShader->SetParameter("projectionMatrix", &pmat[0][0]);
lpassShader->SetParameter("viewMatrix", &vmat[0][0]);
lpassShader->SetParameter("screenSize", WINDOW_WIDTH, WINDOW_HEIGHT);
// Set the eye position to the camera position.
Vector3 cpos = cam.GetPosition();
lpassShader->SetParameter("eyePosition", cpos.x, cpos.y, cpos.z);
lpassShader->SetParameter("farClipDistance", cam.GetFarClippingPlane());
// Texture locations
lpassShader->SetParameter("difftex", 0);
lpassShader->SetParameter("normtex", 1);
lpassShader->SetParameter("postex", 2);
// Draw point lights.
Matrix lmat = l.GetMatrix();
lpassShader->SetParameter("modelMatrix", &lmat[0][0]);
const Vector3& pos = l.GetPosition();
lpassShader->SetParameter("lightPos", pos.x, pos.y, pos.z);
// Itensity.
lpassShader->SetParameter("ambientIntensity", l.GetAmbientIntensity());
lpassShader->SetParameter("diffuseIntensity", l.GetDiffuseIntensity());
// Attenuation.
lpassShader->SetParameter("attenuationConstant", l.GetAttenuationConstant());
lpassShader->SetParameter("attenuationLinear", l.GetAttenuationLinear());
lpassShader->SetParameter("attenuationExponential", l.GetAttenuationExponential());
Color diffuseColor = l.GetColor();
lpassShader->SetParameter("lightColor", diffuseColor.R(), diffuseColor.G(), diffuseColor.B());
pointLightMesh.Draw();
glCullFace(GL_BACK);
glDisable(GL_BLEND);
}
void BaseLightShaderModule::Use(Mesh* mesh, mat4 toWorldTransform, Camera* camera)
{
float specularPower = BaseLight::GetSpecularPower();
float specularIntensity = BaseLight::GetSpecularIntensity();
glUniform1f(_specularPowerLocation, specularPower);
glUniform1f(_specularIntensityLocation, specularIntensity);
vec3 eyePos = camera->GetPositionInWorld();
glUniform3f(_eyeWorldPosLocation, eyePos.x, eyePos.y, eyePos.z);
DirectionLight* dirLight = Director::GetInstance()->GetCurrentTree()->_directionLight;
if (dirLight)
{
glUniform3f(_dirLightUniformLocation.color, dirLight->GetColor().r, dirLight->GetColor().g, dirLight->GetColor().b);
glUniform1f(_dirLightUniformLocation.ambientIntensity, dirLight->GetAmbientIntensity());
glUniform1f(_dirLightUniformLocation.diffuseIntensity, dirLight->GetDiffuseIntensity());
vec3 direction = dirLight->GetDirection();
direction = glm::normalize(direction);
glUniform3f(_dirLightUniformLocation.direction, direction.x, direction.y, direction.z);
}
vector<PointLight*>& pointLights = Director::GetInstance()->GetCurrentTree()->_pointLights;
glUniform1i(_pointLightsNumLocation, pointLights.size());
for (int i = 0; i < pointLights.size(); i++)
{
PointLight* light = pointLights[i];
tPointLightLocation& loc = _pointLightsLocation[i];
glUniform3f(loc.color, light->GetColor().r, light->GetColor().g, light->GetColor().b);
glUniform1f(loc.ambientIntensity, light->GetAmbientIntensity());
glUniform1f(loc.diffuseIntensity, light->GetDiffuseIntensity());
vec3 lightWorldPos = light->GetPositionInWorld();
glUniform3f(loc.worldPos, lightWorldPos.x, lightWorldPos.y, lightWorldPos.z);
glUniform1f(loc.constant, light->GetConstant());
glUniform1f(loc.linear, light->GetLinear());
glUniform1f(loc.exp, light->GetExp());
}
vector<SpotLight*>& spotLights = Director::GetInstance()->GetCurrentTree()->_spotLights;
glUniform1i(_spotLightsNumLocation, spotLights.size());
for (int i = 0; i < spotLights.size(); i++)
{
SpotLight* light = spotLights[i];
tSpotLightLocation& loc = _spotLightsLocation[i];
glUniform3f(loc.color, light->GetColor().r, light->GetColor().g, light->GetColor().b);
glUniform1f(loc.ambientIntensity, light->GetAmbientIntensity());
glUniform1f(loc.diffuseIntensity, light->GetDiffuseIntensity());
vec3 lightWorldPos = light->GetPositionInWorld();
glUniform3f(loc.worldPos, lightWorldPos.x, lightWorldPos.y, lightWorldPos.z);
glUniform1f(loc.constant, light->GetConstant());
glUniform1f(loc.linear, light->GetLinear());
glUniform1f(loc.exp, light->GetExp());
vec3 direction = light->GetDirection();
direction = glm::normalize(direction);
glUniform3f(loc.direction, direction.x, direction.y, direction.z);
glUniform1f(loc.cutoff, light->GetCutoff());
}
glUniform1i(_openNormalMapLocation, mesh->HaveNormalMap() ? 1 : 0);
}