void Batch::Prepare(View* view, bool setModelTransform) const
{
if (!vertexShader_ || !pixelShader_)
return;
Graphics* graphics = view->GetGraphics();
Renderer* renderer = view->GetRenderer();
Node* cameraNode = camera_ ? camera_->GetNode() : 0;
Light* light = lightQueue_ ? lightQueue_->light_ : 0;
Texture2D* shadowMap = lightQueue_ ? lightQueue_->shadowMap_ : 0;
// Set pass / material-specific renderstates
if (pass_ && material_)
{
bool isShadowPass = pass_->GetType() == PASS_SHADOW;
BlendMode blend = pass_->GetBlendMode();
// Turn additive blending into subtract if the light is negative
if (light && light->IsNegative())
{
if (blend == BLEND_ADD)
blend = BLEND_SUBTRACT;
else if (blend == BLEND_ADDALPHA)
blend = BLEND_SUBTRACTALPHA;
}
graphics->SetBlendMode(blend);
renderer->SetCullMode(isShadowPass ? material_->GetShadowCullMode() : material_->GetCullMode(), camera_);
if (!isShadowPass)
{
const BiasParameters& depthBias = material_->GetDepthBias();
graphics->SetDepthBias(depthBias.constantBias_, depthBias.slopeScaledBias_);
}
graphics->SetDepthTest(pass_->GetDepthTestMode());
graphics->SetDepthWrite(pass_->GetDepthWrite());
}
// Set shaders first. The available shader parameters and their register/uniform positions depend on the currently set shaders
graphics->SetShaders(vertexShader_, pixelShader_);
// Set global (per-frame) shader parameters
if (graphics->NeedParameterUpdate(SP_FRAME, (void*)0))
view->SetGlobalShaderParameters();
// Set camera shader parameters
unsigned cameraHash = overrideView_ ? (unsigned)(size_t)camera_ + 4 : (unsigned)(size_t)camera_;
if (graphics->NeedParameterUpdate(SP_CAMERA, reinterpret_cast<void*>(cameraHash)))
view->SetCameraShaderParameters(camera_, true, overrideView_);
// Set viewport shader parameters
IntVector2 rtSize = graphics->GetRenderTargetDimensions();
IntRect viewport = graphics->GetViewport();
unsigned viewportHash = (viewport.left_) | (viewport.top_ << 8) | (viewport.right_ << 16) | (viewport.bottom_ << 24);
if (graphics->NeedParameterUpdate(SP_VIEWPORT, reinterpret_cast<void*>(viewportHash)))
{
float rtWidth = (float)rtSize.x_;
float rtHeight = (float)rtSize.y_;
float widthRange = 0.5f * viewport.Width() / rtWidth;
float heightRange = 0.5f * viewport.Height() / rtHeight;
#ifdef URHO3D_OPENGL
Vector4 bufferUVOffset(((float)viewport.left_) / rtWidth + widthRange,
1.0f - (((float)viewport.top_) / rtHeight + heightRange), widthRange, heightRange);
#else
Vector4 bufferUVOffset((0.5f + (float)viewport.left_) / rtWidth + widthRange,
(0.5f + (float)viewport.top_) / rtHeight + heightRange, widthRange, heightRange);
#endif
graphics->SetShaderParameter(VSP_GBUFFEROFFSETS, bufferUVOffset);
float sizeX = 1.0f / rtWidth;
float sizeY = 1.0f / rtHeight;
graphics->SetShaderParameter(PSP_GBUFFERINVSIZE, Vector4(sizeX, sizeY, 0.0f, 0.0f));
}
// Set model or skinning transforms
if (setModelTransform && graphics->NeedParameterUpdate(SP_OBJECTTRANSFORM, worldTransform_))
{
if (geometryType_ == GEOM_SKINNED)
{
graphics->SetShaderParameter(VSP_SKINMATRICES, reinterpret_cast<const float*>(worldTransform_),
12 * numWorldTransforms_);
}
else
graphics->SetShaderParameter(VSP_MODEL, *worldTransform_);
// Set the orientation for billboards, either from the object itself or from the camera
if (geometryType_ == GEOM_BILLBOARD)
{
if (numWorldTransforms_ > 1)
graphics->SetShaderParameter(VSP_BILLBOARDROT, worldTransform_[1].RotationMatrix());
else
graphics->SetShaderParameter(VSP_BILLBOARDROT, cameraNode->GetWorldRotation().RotationMatrix());
}
}
// Set zone-related shader parameters
BlendMode blend = graphics->GetBlendMode();
// If the pass is additive, override fog color to black so that shaders do not need a separate additive path
bool overrideFogColorToBlack = blend == BLEND_ADD || blend == BLEND_ADDALPHA;
unsigned zoneHash = (unsigned)(size_t)zone_;
if (overrideFogColorToBlack)
zoneHash += 0x80000000;
if (zone_ && graphics->NeedParameterUpdate(SP_ZONE, reinterpret_cast<void*>(zoneHash)))
{
graphics->SetShaderParameter(VSP_AMBIENTSTARTCOLOR, zone_->GetAmbientStartColor());
graphics->SetShaderParameter(VSP_AMBIENTENDCOLOR, zone_->GetAmbientEndColor().ToVector4() - zone_->GetAmbientStartColor().ToVector4());
const BoundingBox& box = zone_->GetBoundingBox();
Vector3 boxSize = box.Size();
Matrix3x4 adjust(Matrix3x4::IDENTITY);
adjust.SetScale(Vector3(1.0f / boxSize.x_, 1.0f / boxSize.y_, 1.0f / boxSize.z_));
adjust.SetTranslation(Vector3(0.5f, 0.5f, 0.5f));
Matrix3x4 zoneTransform = adjust * zone_->GetInverseWorldTransform();
graphics->SetShaderParameter(VSP_ZONE, zoneTransform);
graphics->SetShaderParameter(PSP_AMBIENTCOLOR, zone_->GetAmbientColor());
graphics->SetShaderParameter(PSP_FOGCOLOR, overrideFogColorToBlack ? Color::BLACK : zone_->GetFogColor());
float farClip = camera_->GetFarClip();
float fogStart = Min(zone_->GetFogStart(), farClip);
float fogEnd = Min(zone_->GetFogEnd(), farClip);
if (fogStart >= fogEnd * (1.0f - M_LARGE_EPSILON))
fogStart = fogEnd * (1.0f - M_LARGE_EPSILON);
float fogRange = Max(fogEnd - fogStart, M_EPSILON);
Vector4 fogParams(fogEnd / farClip, farClip / fogRange, 0.0f, 0.0f);
Node* zoneNode = zone_->GetNode();
if (zone_->GetHeightFog() && zoneNode)
{
Vector3 worldFogHeightVec = zoneNode->GetWorldTransform() * Vector3(0.0f, zone_->GetFogHeight(), 0.0f);
fogParams.z_ = worldFogHeightVec.y_;
fogParams.w_ = zone_->GetFogHeightScale() / Max(zoneNode->GetWorldScale().y_, M_EPSILON);
}
graphics->SetShaderParameter(PSP_FOGPARAMS, fogParams);
}
// Set light-related shader parameters
if (lightQueue_)
{
if (graphics->NeedParameterUpdate(SP_VERTEXLIGHTS, lightQueue_) && graphics->HasShaderParameter(VS, VSP_VERTEXLIGHTS))
{
Vector4 vertexLights[MAX_VERTEX_LIGHTS * 3];
const PODVector<Light*>& lights = lightQueue_->vertexLights_;
for (unsigned i = 0; i < lights.Size(); ++i)
{
Light* vertexLight = lights[i];
Node* vertexLightNode = vertexLight->GetNode();
LightType type = vertexLight->GetLightType();
// Attenuation
float invRange, cutoff, invCutoff;
if (type == LIGHT_DIRECTIONAL)
invRange = 0.0f;
else
invRange = 1.0f / Max(vertexLight->GetRange(), M_EPSILON);
if (type == LIGHT_SPOT)
{
cutoff = Cos(vertexLight->GetFov() * 0.5f);
invCutoff = 1.0f / (1.0f - cutoff);
}
else
{
cutoff = -1.0f;
invCutoff = 1.0f;
}
// Color
float fade = 1.0f;
float fadeEnd = vertexLight->GetDrawDistance();
float fadeStart = vertexLight->GetFadeDistance();
// Do fade calculation for light if both fade & draw distance defined
if (vertexLight->GetLightType() != LIGHT_DIRECTIONAL && fadeEnd > 0.0f && fadeStart > 0.0f && fadeStart < fadeEnd)
fade = Min(1.0f - (vertexLight->GetDistance() - fadeStart) / (fadeEnd - fadeStart), 1.0f);
Color color = vertexLight->GetEffectiveColor() * fade;
vertexLights[i * 3] = Vector4(color.r_, color.g_, color.b_, invRange);
// Direction
vertexLights[i * 3 + 1] = Vector4(-(vertexLightNode->GetWorldDirection()), cutoff);
// Position
vertexLights[i * 3 + 2] = Vector4(vertexLightNode->GetWorldPosition(), invCutoff);
}
if (lights.Size())
graphics->SetShaderParameter(VSP_VERTEXLIGHTS, vertexLights[0].Data(), lights.Size() * 3 * 4);
}
}
if (light && graphics->NeedParameterUpdate(SP_LIGHT, light))
{
// Deferred light volume batches operate in a camera-centered space. Detect from material, zone & pass all being null
bool isLightVolume = !material_ && !pass_ && !zone_;
Matrix3x4 cameraEffectiveTransform = camera_->GetEffectiveWorldTransform();
Vector3 cameraEffectivePos = cameraEffectiveTransform.Translation();
Node* lightNode = light->GetNode();
Matrix3 lightWorldRotation = lightNode->GetWorldRotation().RotationMatrix();
graphics->SetShaderParameter(VSP_LIGHTDIR, lightWorldRotation * Vector3::BACK);
float atten = 1.0f / Max(light->GetRange(), M_EPSILON);
graphics->SetShaderParameter(VSP_LIGHTPOS, Vector4(lightNode->GetWorldPosition(), atten));
if (graphics->HasShaderParameter(VS, VSP_LIGHTMATRICES))
{
switch (light->GetLightType())
{
case LIGHT_DIRECTIONAL:
{
Matrix4 shadowMatrices[MAX_CASCADE_SPLITS];
unsigned numSplits = lightQueue_->shadowSplits_.Size();
for (unsigned i = 0; i < numSplits; ++i)
CalculateShadowMatrix(shadowMatrices[i], lightQueue_, i, renderer, Vector3::ZERO);
graphics->SetShaderParameter(VSP_LIGHTMATRICES, shadowMatrices[0].Data(), 16 * numSplits);
}
break;
case LIGHT_SPOT:
{
Matrix4 shadowMatrices[2];
CalculateSpotMatrix(shadowMatrices[0], light, Vector3::ZERO);
bool isShadowed = shadowMap && graphics->HasTextureUnit(TU_SHADOWMAP);
if (isShadowed)
CalculateShadowMatrix(shadowMatrices[1], lightQueue_, 0, renderer, Vector3::ZERO);
graphics->SetShaderParameter(VSP_LIGHTMATRICES, shadowMatrices[0].Data(), isShadowed ? 32 : 16);
}
break;
case LIGHT_POINT:
{
Matrix4 lightVecRot(lightNode->GetWorldRotation().RotationMatrix());
// HLSL compiler will pack the parameters as if the matrix is only 3x4, so must be careful to not overwrite
// the next parameter
#ifdef URHO3D_OPENGL
graphics->SetShaderParameter(VSP_LIGHTMATRICES, lightVecRot.Data(), 16);
#else
graphics->SetShaderParameter(VSP_LIGHTMATRICES, lightVecRot.Data(), 12);
#endif
}
break;
}
}
float fade = 1.0f;
float fadeEnd = light->GetDrawDistance();
float fadeStart = light->GetFadeDistance();
// Do fade calculation for light if both fade & draw distance defined
if (light->GetLightType() != LIGHT_DIRECTIONAL && fadeEnd > 0.0f && fadeStart > 0.0f && fadeStart < fadeEnd)
fade = Min(1.0f - (light->GetDistance() - fadeStart) / (fadeEnd - fadeStart), 1.0f);
// Negative lights will use subtract blending, so write absolute RGB values to the shader parameter
graphics->SetShaderParameter(PSP_LIGHTCOLOR, Color(light->GetEffectiveColor().Abs(),
light->GetEffectiveSpecularIntensity()) * fade);
graphics->SetShaderParameter(PSP_LIGHTDIR, lightWorldRotation * Vector3::BACK);
graphics->SetShaderParameter(PSP_LIGHTPOS, Vector4((isLightVolume ? (lightNode->GetWorldPosition() -
cameraEffectivePos) : lightNode->GetWorldPosition()), atten));
if (graphics->HasShaderParameter(PS, PSP_LIGHTMATRICES))
{
switch (light->GetLightType())
{
case LIGHT_DIRECTIONAL:
{
Matrix4 shadowMatrices[MAX_CASCADE_SPLITS];
unsigned numSplits = lightQueue_->shadowSplits_.Size();
for (unsigned i = 0; i < numSplits; ++i)
{
CalculateShadowMatrix(shadowMatrices[i], lightQueue_, i, renderer, isLightVolume ? cameraEffectivePos :
Vector3::ZERO);
}
graphics->SetShaderParameter(PSP_LIGHTMATRICES, shadowMatrices[0].Data(), 16 * numSplits);
}
break;
case LIGHT_SPOT:
{
Matrix4 shadowMatrices[2];
CalculateSpotMatrix(shadowMatrices[0], light, cameraEffectivePos);
bool isShadowed = lightQueue_->shadowMap_ != 0;
if (isShadowed)
{
CalculateShadowMatrix(shadowMatrices[1], lightQueue_, 0, renderer, isLightVolume ? cameraEffectivePos :
Vector3::ZERO);
}
graphics->SetShaderParameter(PSP_LIGHTMATRICES, shadowMatrices[0].Data(), isShadowed ? 32 : 16);
}
break;
case LIGHT_POINT:
{
Matrix4 lightVecRot(lightNode->GetWorldRotation().RotationMatrix());
// HLSL compiler will pack the parameters as if the matrix is only 3x4, so must be careful to not overwrite
// the next parameter
#ifdef URHO3D_OPENGL
graphics->SetShaderParameter(PSP_LIGHTMATRICES, lightVecRot.Data(), 16);
#else
graphics->SetShaderParameter(PSP_LIGHTMATRICES, lightVecRot.Data(), 12);
#endif
}
break;
}
}
// Set shadow mapping shader parameters
if (shadowMap)
{
{
// Calculate point light shadow sampling offsets (unrolled cube map)
unsigned faceWidth = shadowMap->GetWidth() / 2;
unsigned faceHeight = shadowMap->GetHeight() / 3;
float width = (float)shadowMap->GetWidth();
float height = (float)shadowMap->GetHeight();
#ifdef URHO3D_OPENGL
float mulX = (float)(faceWidth - 3) / width;
float mulY = (float)(faceHeight - 3) / height;
float addX = 1.5f / width;
float addY = 1.5f / height;
#else
float mulX = (float)(faceWidth - 4) / width;
float mulY = (float)(faceHeight - 4) / height;
float addX = 2.5f / width;
float addY = 2.5f / height;
#endif
// If using 4 shadow samples, offset the position diagonally by half pixel
if (renderer->GetShadowQuality() & SHADOWQUALITY_HIGH_16BIT)
{
addX -= 0.5f / width;
addY -= 0.5f / height;
}
graphics->SetShaderParameter(PSP_SHADOWCUBEADJUST, Vector4(mulX, mulY, addX, addY));
}
{
// Calculate shadow camera depth parameters for point light shadows and shadow fade parameters for
// directional light shadows, stored in the same uniform
Camera* shadowCamera = lightQueue_->shadowSplits_[0].shadowCamera_;
float nearClip = shadowCamera->GetNearClip();
float farClip = shadowCamera->GetFarClip();
float q = farClip / (farClip - nearClip);
float r = -q * nearClip;
const CascadeParameters& parameters = light->GetShadowCascade();
float viewFarClip = camera_->GetFarClip();
float shadowRange = parameters.GetShadowRange();
float fadeStart = parameters.fadeStart_ * shadowRange / viewFarClip;
float fadeEnd = shadowRange / viewFarClip;
float fadeRange = fadeEnd - fadeStart;
graphics->SetShaderParameter(PSP_SHADOWDEPTHFADE, Vector4(q, r, fadeStart, 1.0f / fadeRange));
}
{
float intensity = light->GetShadowIntensity();
float fadeStart = light->GetShadowFadeDistance();
float fadeEnd = light->GetShadowDistance();
if (fadeStart > 0.0f && fadeEnd > 0.0f && fadeEnd > fadeStart)
intensity = Lerp(intensity, 1.0f, Clamp((light->GetDistance() - fadeStart) / (fadeEnd - fadeStart), 0.0f, 1.0f));
float pcfValues = (1.0f - intensity);
float samples = renderer->GetShadowQuality() >= SHADOWQUALITY_HIGH_16BIT ? 4.0f : 1.0f;
graphics->SetShaderParameter(PSP_SHADOWINTENSITY, Vector4(pcfValues / samples, intensity, 0.0f, 0.0f));
}
float sizeX = 1.0f / (float)shadowMap->GetWidth();
float sizeY = 1.0f / (float)shadowMap->GetHeight();
graphics->SetShaderParameter(PSP_SHADOWMAPINVSIZE, Vector4(sizeX, sizeY, 0.0f, 0.0f));
Vector4 lightSplits(M_LARGE_VALUE, M_LARGE_VALUE, M_LARGE_VALUE, M_LARGE_VALUE);
if (lightQueue_->shadowSplits_.Size() > 1)
lightSplits.x_ = lightQueue_->shadowSplits_[0].farSplit_ / camera_->GetFarClip();
if (lightQueue_->shadowSplits_.Size() > 2)
lightSplits.y_ = lightQueue_->shadowSplits_[1].farSplit_ / camera_->GetFarClip();
if (lightQueue_->shadowSplits_.Size() > 3)
lightSplits.z_ = lightQueue_->shadowSplits_[2].farSplit_ / camera_->GetFarClip();
graphics->SetShaderParameter(PSP_SHADOWSPLITS, lightSplits);
}
}
// Set material-specific shader parameters and textures
if (material_)
{
if (graphics->NeedParameterUpdate(SP_MATERIAL, material_))
{
// Update shader parameter animations
material_->UpdateShaderParameterAnimations();
const HashMap<StringHash, MaterialShaderParameter>& parameters = material_->GetShaderParameters();
for (HashMap<StringHash, MaterialShaderParameter>::ConstIterator i = parameters.Begin(); i != parameters.End(); ++i)
graphics->SetShaderParameter(i->first_, i->second_.value_);
}
const SharedPtr<Texture>* textures = material_->GetTextures();
for (unsigned i = 0; i < MAX_MATERIAL_TEXTURE_UNITS; ++i)
{
TextureUnit unit = (TextureUnit)i;
if (textures[i] && graphics->HasTextureUnit(unit))
graphics->SetTexture(i, textures[i]);
}
}
// Set light-related textures
if (light)
{
if (shadowMap && graphics->HasTextureUnit(TU_SHADOWMAP))
graphics->SetTexture(TU_SHADOWMAP, shadowMap);
if (graphics->HasTextureUnit(TU_LIGHTRAMP))
{
Texture* rampTexture = light->GetRampTexture();
if (!rampTexture)
rampTexture = renderer->GetDefaultLightRamp();
graphics->SetTexture(TU_LIGHTRAMP, rampTexture);
}
if (graphics->HasTextureUnit(TU_LIGHTSHAPE))
{
Texture* shapeTexture = light->GetShapeTexture();
if (!shapeTexture && light->GetLightType() == LIGHT_SPOT)
shapeTexture = renderer->GetDefaultLightSpot();
graphics->SetTexture(TU_LIGHTSHAPE, shapeTexture);
}
}
}
void Batch::Prepare(View* view, Camera* camera, bool setModelTransform, bool allowDepthWrite) const
{
if (!vertexShader_ || !pixelShader_)
return;
Graphics* graphics = view->GetGraphics();
Renderer* renderer = view->GetRenderer();
Node* cameraNode = camera ? camera->GetNode() : 0;
Light* light = lightQueue_ ? lightQueue_->light_ : 0;
Texture2D* shadowMap = lightQueue_ ? lightQueue_->shadowMap_ : 0;
// Set shaders first. The available shader parameters and their register/uniform positions depend on the currently set shaders
graphics->SetShaders(vertexShader_, pixelShader_);
// Set pass / material-specific renderstates
if (pass_ && material_)
{
BlendMode blend = pass_->GetBlendMode();
// Turn additive blending into subtract if the light is negative
if (light && light->IsNegative())
{
if (blend == BLEND_ADD)
blend = BLEND_SUBTRACT;
else if (blend == BLEND_ADDALPHA)
blend = BLEND_SUBTRACTALPHA;
}
graphics->SetBlendMode(blend);
bool isShadowPass = pass_->GetIndex() == Technique::shadowPassIndex;
CullMode effectiveCullMode = pass_->GetCullMode();
// Get cull mode from material if pass doesn't override it
if (effectiveCullMode == MAX_CULLMODES)
effectiveCullMode = isShadowPass ? material_->GetShadowCullMode() : material_->GetCullMode();
renderer->SetCullMode(effectiveCullMode, camera);
if (!isShadowPass)
{
const BiasParameters& depthBias = material_->GetDepthBias();
graphics->SetDepthBias(depthBias.constantBias_, depthBias.slopeScaledBias_);
}
// Use the "least filled" fill mode combined from camera & material
graphics->SetFillMode((FillMode)(Max(camera->GetFillMode(), material_->GetFillMode())));
graphics->SetDepthTest(pass_->GetDepthTestMode());
graphics->SetDepthWrite(pass_->GetDepthWrite() && allowDepthWrite);
}
// Set global (per-frame) shader parameters
if (graphics->NeedParameterUpdate(SP_FRAME, (void*)0))
view->SetGlobalShaderParameters();
// Set camera & viewport shader parameters
unsigned cameraHash = (unsigned)(size_t)camera;
IntRect viewport = graphics->GetViewport();
IntVector2 viewSize = IntVector2(viewport.Width(), viewport.Height());
unsigned viewportHash = (unsigned)(viewSize.x_ | (viewSize.y_ << 16));
if (graphics->NeedParameterUpdate(SP_CAMERA, reinterpret_cast<const void*>(cameraHash + viewportHash)))
{
view->SetCameraShaderParameters(camera);
// During renderpath commands the G-Buffer or viewport texture is assumed to always be viewport-sized
view->SetGBufferShaderParameters(viewSize, IntRect(0, 0, viewSize.x_, viewSize.y_));
}
// Set model or skinning transforms
if (setModelTransform && graphics->NeedParameterUpdate(SP_OBJECT, worldTransform_))
{
if (geometryType_ == GEOM_SKINNED)
{
graphics->SetShaderParameter(VSP_SKINMATRICES, reinterpret_cast<const float*>(worldTransform_),
12 * numWorldTransforms_);
}
else
graphics->SetShaderParameter(VSP_MODEL, *worldTransform_);
// Set the orientation for billboards, either from the object itself or from the camera
if (geometryType_ == GEOM_BILLBOARD)
{
if (numWorldTransforms_ > 1)
graphics->SetShaderParameter(VSP_BILLBOARDROT, worldTransform_[1].RotationMatrix());
else
graphics->SetShaderParameter(VSP_BILLBOARDROT, cameraNode->GetWorldRotation().RotationMatrix());
}
}
// Set zone-related shader parameters
BlendMode blend = graphics->GetBlendMode();
// If the pass is additive, override fog color to black so that shaders do not need a separate additive path
bool overrideFogColorToBlack = blend == BLEND_ADD || blend == BLEND_ADDALPHA;
unsigned zoneHash = (unsigned)(size_t)zone_;
if (overrideFogColorToBlack)
zoneHash += 0x80000000;
if (zone_ && graphics->NeedParameterUpdate(SP_ZONE, reinterpret_cast<const void*>(zoneHash)))
{
graphics->SetShaderParameter(VSP_AMBIENTSTARTCOLOR, zone_->GetAmbientStartColor());
graphics->SetShaderParameter(VSP_AMBIENTENDCOLOR,
zone_->GetAmbientEndColor().ToVector4() - zone_->GetAmbientStartColor().ToVector4());
const BoundingBox& box = zone_->GetBoundingBox();
Vector3 boxSize = box.Size();
Matrix3x4 adjust(Matrix3x4::IDENTITY);
adjust.SetScale(Vector3(1.0f / boxSize.x_, 1.0f / boxSize.y_, 1.0f / boxSize.z_));
adjust.SetTranslation(Vector3(0.5f, 0.5f, 0.5f));
Matrix3x4 zoneTransform = adjust * zone_->GetInverseWorldTransform();
graphics->SetShaderParameter(VSP_ZONE, zoneTransform);
graphics->SetShaderParameter(PSP_AMBIENTCOLOR, zone_->GetAmbientColor());
graphics->SetShaderParameter(PSP_FOGCOLOR, overrideFogColorToBlack ? Color::BLACK : zone_->GetFogColor());
float farClip = camera->GetFarClip();
float fogStart = Min(zone_->GetFogStart(), farClip);
float fogEnd = Min(zone_->GetFogEnd(), farClip);
if (fogStart >= fogEnd * (1.0f - M_LARGE_EPSILON))
fogStart = fogEnd * (1.0f - M_LARGE_EPSILON);
float fogRange = Max(fogEnd - fogStart, M_EPSILON);
Vector4 fogParams(fogEnd / farClip, farClip / fogRange, 0.0f, 0.0f);
Node* zoneNode = zone_->GetNode();
if (zone_->GetHeightFog() && zoneNode)
{
Vector3 worldFogHeightVec = zoneNode->GetWorldTransform() * Vector3(0.0f, zone_->GetFogHeight(), 0.0f);
fogParams.z_ = worldFogHeightVec.y_;
fogParams.w_ = zone_->GetFogHeightScale() / Max(zoneNode->GetWorldScale().y_, M_EPSILON);
}
graphics->SetShaderParameter(PSP_FOGPARAMS, fogParams);
}
// Set light-related shader parameters
if (lightQueue_)
{
if (light && graphics->NeedParameterUpdate(SP_LIGHT, lightQueue_))
{
Node* lightNode = light->GetNode();
float atten = 1.0f / Max(light->GetRange(), M_EPSILON);
Vector3 lightDir(lightNode->GetWorldRotation() * Vector3::BACK);
Vector4 lightPos(lightNode->GetWorldPosition(), atten);
graphics->SetShaderParameter(VSP_LIGHTDIR, lightDir);
graphics->SetShaderParameter(VSP_LIGHTPOS, lightPos);
if (graphics->HasShaderParameter(VSP_LIGHTMATRICES))
{
switch (light->GetLightType())
{
case LIGHT_DIRECTIONAL:
{
Matrix4 shadowMatrices[MAX_CASCADE_SPLITS];
unsigned numSplits = Min(MAX_CASCADE_SPLITS, lightQueue_->shadowSplits_.Size());
for (unsigned i = 0; i < numSplits; ++i)
CalculateShadowMatrix(shadowMatrices[i], lightQueue_, i, renderer);
graphics->SetShaderParameter(VSP_LIGHTMATRICES, shadowMatrices[0].Data(), 16 * numSplits);
}
break;
case LIGHT_SPOT:
{
Matrix4 shadowMatrices[2];
CalculateSpotMatrix(shadowMatrices[0], light);
bool isShadowed = shadowMap && graphics->HasTextureUnit(TU_SHADOWMAP);
if (isShadowed)
CalculateShadowMatrix(shadowMatrices[1], lightQueue_, 0, renderer);
graphics->SetShaderParameter(VSP_LIGHTMATRICES, shadowMatrices[0].Data(), isShadowed ? 32 : 16);
}
break;
case LIGHT_POINT:
{
Matrix4 lightVecRot(lightNode->GetWorldRotation().RotationMatrix());
// HLSL compiler will pack the parameters as if the matrix is only 3x4, so must be careful to not overwrite
// the next parameter
#ifdef ATOMIC_OPENGL
graphics->SetShaderParameter(VSP_LIGHTMATRICES, lightVecRot.Data(), 16);
#else
graphics->SetShaderParameter(VSP_LIGHTMATRICES, lightVecRot.Data(), 12);
#endif
}
break;
}
}
float fade = 1.0f;
float fadeEnd = light->GetDrawDistance();
float fadeStart = light->GetFadeDistance();
// Do fade calculation for light if both fade & draw distance defined
if (light->GetLightType() != LIGHT_DIRECTIONAL && fadeEnd > 0.0f && fadeStart > 0.0f && fadeStart < fadeEnd)
fade = Min(1.0f - (light->GetDistance() - fadeStart) / (fadeEnd - fadeStart), 1.0f);
// Negative lights will use subtract blending, so write absolute RGB values to the shader parameter
graphics->SetShaderParameter(PSP_LIGHTCOLOR, Color(light->GetEffectiveColor().Abs(),
light->GetEffectiveSpecularIntensity()) * fade);
graphics->SetShaderParameter(PSP_LIGHTDIR, lightDir);
graphics->SetShaderParameter(PSP_LIGHTPOS, lightPos);
if (graphics->HasShaderParameter(PSP_LIGHTMATRICES))
{
switch (light->GetLightType())
{
case LIGHT_DIRECTIONAL:
{
Matrix4 shadowMatrices[MAX_CASCADE_SPLITS];
unsigned numSplits = Min(MAX_CASCADE_SPLITS, lightQueue_->shadowSplits_.Size());
for (unsigned i = 0; i < numSplits; ++i)
CalculateShadowMatrix(shadowMatrices[i], lightQueue_, i, renderer);
graphics->SetShaderParameter(PSP_LIGHTMATRICES, shadowMatrices[0].Data(), 16 * numSplits);
}
break;
case LIGHT_SPOT:
{
Matrix4 shadowMatrices[2];
CalculateSpotMatrix(shadowMatrices[0], light);
bool isShadowed = lightQueue_->shadowMap_ != 0;
if (isShadowed)
CalculateShadowMatrix(shadowMatrices[1], lightQueue_, 0, renderer);
graphics->SetShaderParameter(PSP_LIGHTMATRICES, shadowMatrices[0].Data(), isShadowed ? 32 : 16);
}
break;
case LIGHT_POINT:
{
Matrix4 lightVecRot(lightNode->GetWorldRotation().RotationMatrix());
// HLSL compiler will pack the parameters as if the matrix is only 3x4, so must be careful to not overwrite
// the next parameter
#ifdef ATOMIC_OPENGL
graphics->SetShaderParameter(PSP_LIGHTMATRICES, lightVecRot.Data(), 16);
#else
graphics->SetShaderParameter(PSP_LIGHTMATRICES, lightVecRot.Data(), 12);
#endif
}
break;
}
}
// Set shadow mapping shader parameters
if (shadowMap)
{
{
// Calculate point light shadow sampling offsets (unrolled cube map)
unsigned faceWidth = (unsigned)(shadowMap->GetWidth() / 2);
unsigned faceHeight = (unsigned)(shadowMap->GetHeight() / 3);
float width = (float)shadowMap->GetWidth();
float height = (float)shadowMap->GetHeight();
#ifdef ATOMIC_OPENGL
float mulX = (float)(faceWidth - 3) / width;
float mulY = (float)(faceHeight - 3) / height;
float addX = 1.5f / width;
float addY = 1.5f / height;
#else
float mulX = (float)(faceWidth - 4) / width;
float mulY = (float)(faceHeight - 4) / height;
float addX = 2.5f / width;
float addY = 2.5f / height;
#endif
// If using 4 shadow samples, offset the position diagonally by half pixel
if (renderer->GetShadowQuality() == SHADOWQUALITY_PCF_16BIT || renderer->GetShadowQuality() == SHADOWQUALITY_PCF_24BIT)
{
addX -= 0.5f / width;
addY -= 0.5f / height;
}
graphics->SetShaderParameter(PSP_SHADOWCUBEADJUST, Vector4(mulX, mulY, addX, addY));
}
{
// Calculate shadow camera depth parameters for point light shadows and shadow fade parameters for
// directional light shadows, stored in the same uniform
Camera* shadowCamera = lightQueue_->shadowSplits_[0].shadowCamera_;
float nearClip = shadowCamera->GetNearClip();
float farClip = shadowCamera->GetFarClip();
float q = farClip / (farClip - nearClip);
float r = -q * nearClip;
const CascadeParameters& parameters = light->GetShadowCascade();
float viewFarClip = camera->GetFarClip();
float shadowRange = parameters.GetShadowRange();
float fadeStart = parameters.fadeStart_ * shadowRange / viewFarClip;
float fadeEnd = shadowRange / viewFarClip;
float fadeRange = fadeEnd - fadeStart;
graphics->SetShaderParameter(PSP_SHADOWDEPTHFADE, Vector4(q, r, fadeStart, 1.0f / fadeRange));
}
{
float intensity = light->GetShadowIntensity();
float fadeStart = light->GetShadowFadeDistance();
float fadeEnd = light->GetShadowDistance();
if (fadeStart > 0.0f && fadeEnd > 0.0f && fadeEnd > fadeStart)
intensity =
Lerp(intensity, 1.0f, Clamp((light->GetDistance() - fadeStart) / (fadeEnd - fadeStart), 0.0f, 1.0f));
float pcfValues = (1.0f - intensity);
float samples = 1.0f;
if (renderer->GetShadowQuality() == SHADOWQUALITY_PCF_16BIT || renderer->GetShadowQuality() == SHADOWQUALITY_PCF_24BIT)
samples = 4.0f;
graphics->SetShaderParameter(PSP_SHADOWINTENSITY, Vector4(pcfValues / samples, intensity, 0.0f, 0.0f));
}
float sizeX = 1.0f / (float)shadowMap->GetWidth();
float sizeY = 1.0f / (float)shadowMap->GetHeight();
graphics->SetShaderParameter(PSP_SHADOWMAPINVSIZE, Vector2(sizeX, sizeY));
Vector4 lightSplits(M_LARGE_VALUE, M_LARGE_VALUE, M_LARGE_VALUE, M_LARGE_VALUE);
if (lightQueue_->shadowSplits_.Size() > 1)
lightSplits.x_ = lightQueue_->shadowSplits_[0].farSplit_ / camera->GetFarClip();
if (lightQueue_->shadowSplits_.Size() > 2)
lightSplits.y_ = lightQueue_->shadowSplits_[1].farSplit_ / camera->GetFarClip();
if (lightQueue_->shadowSplits_.Size() > 3)
lightSplits.z_ = lightQueue_->shadowSplits_[2].farSplit_ / camera->GetFarClip();
graphics->SetShaderParameter(PSP_SHADOWSPLITS, lightSplits);
if (graphics->HasShaderParameter(PSP_VSMSHADOWPARAMS))
graphics->SetShaderParameter(PSP_VSMSHADOWPARAMS, renderer->GetVSMShadowParameters());
if (light->GetShadowBias().normalOffset_ > 0.0f)
{
Vector4 normalOffsetScale(Vector4::ZERO);
// Scale normal offset strength with the width of the shadow camera view
if (light->GetLightType() != LIGHT_DIRECTIONAL)
{
Camera* shadowCamera = lightQueue_->shadowSplits_[0].shadowCamera_;
normalOffsetScale.x_ = 2.0f * tanf(shadowCamera->GetFov() * M_DEGTORAD * 0.5f) * shadowCamera->GetFarClip();
}
else
{
normalOffsetScale.x_ = lightQueue_->shadowSplits_[0].shadowCamera_->GetOrthoSize();
if (lightQueue_->shadowSplits_.Size() > 1)
normalOffsetScale.y_ = lightQueue_->shadowSplits_[1].shadowCamera_->GetOrthoSize();
if (lightQueue_->shadowSplits_.Size() > 2)
normalOffsetScale.z_ = lightQueue_->shadowSplits_[2].shadowCamera_->GetOrthoSize();
if (lightQueue_->shadowSplits_.Size() > 3)
normalOffsetScale.w_ = lightQueue_->shadowSplits_[3].shadowCamera_->GetOrthoSize();
}
normalOffsetScale *= light->GetShadowBias().normalOffset_;
#ifdef GL_ES_VERSION_2_0
normalOffsetScale *= renderer->GetMobileNormalOffsetMul();
#endif
graphics->SetShaderParameter(VSP_NORMALOFFSETSCALE, normalOffsetScale);
graphics->SetShaderParameter(PSP_NORMALOFFSETSCALE, normalOffsetScale);
}
}
}
else if (lightQueue_->vertexLights_.Size() && graphics->HasShaderParameter(VSP_VERTEXLIGHTS) &&
graphics->NeedParameterUpdate(SP_LIGHT, lightQueue_))
{
Vector4 vertexLights[MAX_VERTEX_LIGHTS * 3];
const PODVector<Light*>& lights = lightQueue_->vertexLights_;
for (unsigned i = 0; i < lights.Size(); ++i)
{
Light* vertexLight = lights[i];
Node* vertexLightNode = vertexLight->GetNode();
LightType type = vertexLight->GetLightType();
// Attenuation
float invRange, cutoff, invCutoff;
if (type == LIGHT_DIRECTIONAL)
invRange = 0.0f;
else
invRange = 1.0f / Max(vertexLight->GetRange(), M_EPSILON);
if (type == LIGHT_SPOT)
{
cutoff = Cos(vertexLight->GetFov() * 0.5f);
invCutoff = 1.0f / (1.0f - cutoff);
}
else
{
cutoff = -1.0f;
invCutoff = 1.0f;
}
// Color
float fade = 1.0f;
float fadeEnd = vertexLight->GetDrawDistance();
float fadeStart = vertexLight->GetFadeDistance();
// Do fade calculation for light if both fade & draw distance defined
if (vertexLight->GetLightType() != LIGHT_DIRECTIONAL && fadeEnd > 0.0f && fadeStart > 0.0f && fadeStart < fadeEnd)
fade = Min(1.0f - (vertexLight->GetDistance() - fadeStart) / (fadeEnd - fadeStart), 1.0f);
Color color = vertexLight->GetEffectiveColor() * fade;
vertexLights[i * 3] = Vector4(color.r_, color.g_, color.b_, invRange);
// Direction
vertexLights[i * 3 + 1] = Vector4(-(vertexLightNode->GetWorldDirection()), cutoff);
// Position
vertexLights[i * 3 + 2] = Vector4(vertexLightNode->GetWorldPosition(), invCutoff);
}
graphics->SetShaderParameter(VSP_VERTEXLIGHTS, vertexLights[0].Data(), lights.Size() * 3 * 4);
}
}
// Set zone texture if necessary
#ifndef GL_ES_VERSION_2_0
if (zone_ && graphics->HasTextureUnit(TU_ZONE))
graphics->SetTexture(TU_ZONE, zone_->GetZoneTexture());
#else
// On OpenGL ES set the zone texture to the environment unit instead
if (zone_ && zone_->GetZoneTexture() && graphics->HasTextureUnit(TU_ENVIRONMENT))
graphics->SetTexture(TU_ENVIRONMENT, zone_->GetZoneTexture());
#endif
// Set material-specific shader parameters and textures
if (material_)
{
if (graphics->NeedParameterUpdate(SP_MATERIAL, reinterpret_cast<const void*>(material_->GetShaderParameterHash())))
{
const HashMap<StringHash, MaterialShaderParameter>& parameters = material_->GetShaderParameters();
for (HashMap<StringHash, MaterialShaderParameter>::ConstIterator i = parameters.Begin(); i != parameters.End(); ++i)
graphics->SetShaderParameter(i->first_, i->second_.value_);
}
const HashMap<TextureUnit, SharedPtr<Texture> >& textures = material_->GetTextures();
for (HashMap<TextureUnit, SharedPtr<Texture> >::ConstIterator i = textures.Begin(); i != textures.End(); ++i)
{
if (graphics->HasTextureUnit(i->first_))
graphics->SetTexture(i->first_, i->second_.Get());
}
}
// Set light-related textures
if (light)
{
if (shadowMap && graphics->HasTextureUnit(TU_SHADOWMAP))
graphics->SetTexture(TU_SHADOWMAP, shadowMap);
if (graphics->HasTextureUnit(TU_LIGHTRAMP))
{
Texture* rampTexture = light->GetRampTexture();
if (!rampTexture)
rampTexture = renderer->GetDefaultLightRamp();
graphics->SetTexture(TU_LIGHTRAMP, rampTexture);
}
if (graphics->HasTextureUnit(TU_LIGHTSHAPE))
{
Texture* shapeTexture = light->GetShapeTexture();
if (!shapeTexture && light->GetLightType() == LIGHT_SPOT)
shapeTexture = renderer->GetDefaultLightSpot();
graphics->SetTexture(TU_LIGHTSHAPE, shapeTexture);
}
}
}