public virtual void Render(SSRenderConfig renderConfig)
{
// compute and set the modelView matrix, by combining the cameraViewMat
// with the object's world matrix
// ... http://www.songho.ca/opengl/gl_transform.html
// ... http://stackoverflow.com/questions/5798226/3d-graphics-processing-how-to-calculate-modelview-matrix
renderBoundingSphereMesh(renderConfig);
Matrix4 modelViewMat = this.worldMat * renderConfig.invCameraViewMatrix;
if (this.renderState.matchScaleToScreenPixels)
{
Matrix4 scaleCompenstaion = OpenTKHelper.ScaleToScreenPxViewMat(
this.Pos, this.Scale.X, ref renderConfig.invCameraViewMatrix, ref renderConfig.projectionMatrix);
modelViewMat = scaleCompenstaion * modelViewMat;
}
if (this.renderState.doBillboarding)
{
modelViewMat = OpenTKHelper.BillboardMatrix(ref modelViewMat);
}
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadMatrix(ref modelViewMat);
resetTexturingState();
if (renderConfig.drawingShadowMap)
{
if (renderConfig.drawingPssm && renderConfig.pssmShader != null)
{
renderConfig.pssmShader.Activate();
renderConfig.pssmShader.UniObjectWorldTransform = this.worldMat;
}
else
{
SSShaderProgram.DeactivateAll();
}
}
else
{
if (renderState.noShader)
{
SSShaderProgram.DeactivateAll();
}
else
{
setDefaultShaderState(renderConfig.mainShader, renderConfig);
}
setMaterialState();
if (this.alphaBlendingEnabled)
{
GL.Enable(EnableCap.Blend);
GL.BlendEquationSeparate(renderState.blendEquationModeRGB, renderState.blendEquationModeAlpha);
GL.BlendFuncSeparate(renderState.blendFactorSrcRGB, renderState.blendFactorDestRGB,
renderState.blendFactorSrcAlpha, renderState.blendFactorDestAlpha);
//GL.B
}
else
{
GL.Disable(EnableCap.Blend);
}
if (this.renderState.lighted)
{
GL.Enable(EnableCap.Lighting);
GL.ShadeModel(ShadingModel.Flat);
}
else
{
GL.Disable(EnableCap.Lighting);
}
}
if (this.renderState.alphaTest)
{
GL.Enable(EnableCap.AlphaTest);
}
else
{
GL.Disable(EnableCap.AlphaTest);
}
if (this.renderState.depthTest)
{
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(renderState.depthFunc);
}
else
{
GL.Disable(EnableCap.DepthTest);
}
GL.DepthMask(this.renderState.depthWrite);
GL.Disable(EnableCap.LineStipple);
if (preRenderHook != null)
{
preRenderHook(this, renderConfig);
}
}
protected void ComputeProjections(
List <SSObject> objects,
Matrix4 cameraView,
Matrix4 cameraProj,
float fov, float aspect, float cameraNearZ, float cameraFarZ)
{
if (m_light.GetType() != typeof(SSDirectionalLight))
{
throw new NotSupportedException();
}
SSDirectionalLight dirLight = (SSDirectionalLight)m_light;
// light-aligned unit vectors
Vector3 lightZ = dirLight.Direction.Normalized();
Vector3 lightX, lightY;
OpenTKHelper.TwoPerpAxes(lightZ, out lightX, out lightY);
// transform matrix from regular space into light aligned space
Matrix4 lightTransform = new Matrix4(
lightX.X, lightX.Y, lightX.Z, 0f,
lightY.X, lightY.Y, lightY.Z, 0f,
lightZ.X, lightZ.Y, lightZ.Z, 0f,
0f, 0f, 0f, 0f
);
// Step 0: camera projection matrix (nearZ and farZ modified) for each frustum split
float prevFarZ = cameraNearZ;
for (int i = 0; i < c_numberOfSplits; ++i)
{
// generate frustum splits using Practical Split Scheme (GPU Gems 3, 10.2.1)
float iRatio = (float)(i + 1) / (float)c_numberOfSplits;
float cLog = cameraNearZ * (float)Math.Pow(cameraFarZ / cameraNearZ, iRatio);
float cUni = cameraNearZ + (cameraFarZ - cameraNearZ) * iRatio;
float nextFarZ = LogVsLinearSplitFactor * cLog + (1f - LogVsLinearSplitFactor) * cUni;
float nextNearZ = prevFarZ;
// exported to the shader
m_viewSplits [i] = nextFarZ;
// create a view proj matrix with the nearZ, farZ values for the current split
m_frustumViewProjMatrices[i] = cameraView
* Matrix4.CreatePerspectiveFieldOfView(fov, aspect, nextNearZ, nextFarZ);
// create light-aligned AABBs of frustums
m_frustumLightBB [i] = SSAABB.FromFrustum(ref lightTransform, ref m_frustumViewProjMatrices [i]);
prevFarZ = nextFarZ;
}
#if true
// Optional scene-dependent optimization
for (int i = 0; i < c_numberOfSplits; ++i)
{
m_objsLightBB[i] = new SSAABB(float.PositiveInfinity, float.NegativeInfinity);
m_splitFrustums[i] = new SSFrustumCuller(ref m_frustumViewProjMatrices[i]);
m_shrink[i] = false;
}
foreach (var obj in objects)
{
// pass through all shadow casters and receivers
if (obj.renderState.toBeDeleted || obj.localBoundingSphereRadius <= 0f ||
!obj.renderState.visible || !obj.renderState.receivesShadows)
{
continue;
}
else
{
for (int i = 0; i < c_numberOfSplits; ++i)
{
if (m_splitFrustums[i].isSphereInsideFrustum(obj.worldBoundingSphere))
{
// determine AABB in light coordinates of the objects so far
m_shrink[i] = true;
Vector3 lightAlignedPos = Vector3.Transform(obj.worldBoundingSphereCenter, lightTransform);
Vector3 rad = new Vector3(obj.worldBoundingSphereRadius);
Vector3 localMin = lightAlignedPos - rad;
Vector3 localMax = lightAlignedPos + rad;
m_objsLightBB[i].UpdateMin(localMin);
m_objsLightBB[i].UpdateMax(localMax);
}
}
}
}
#endif
for (int i = 0; i < c_numberOfSplits; ++i)
{
if (m_shrink [i])
{
m_resultLightBB[i].Min = Vector3.ComponentMax(m_frustumLightBB [i].Min,
m_objsLightBB [i].Min);
m_resultLightBB [i].Max = Vector3.ComponentMin(m_frustumLightBB [i].Max,
m_objsLightBB [i].Max);
}
else
{
m_resultLightBB [i] = m_frustumLightBB [i];
}
}
for (int i = 0; i < c_numberOfSplits; ++i)
{
// Obtain view + projection + crop matrix, need it later
Matrix4 shadowView, shadowProj;
viewProjFromLightAlignedBB(ref m_resultLightBB [i], ref lightTransform, ref lightY,
out shadowView, out shadowProj);
m_shadowViewProjMatrices[i] = shadowView * shadowProj * c_cropMatrices[i];
// obtain view + projection + clio + bias
m_shadowViewProjBiasMatrices[i] = m_shadowViewProjMatrices[i] * c_biasMatrix;
// There is, currently, no mathematically derived solution to how much Poisson spread scaling
// you need for each split. Current improvisation combines 1) increasing spread for the near
// splits; reducing spread for the far splits and 2) reducing spread for splits with larger
// light-aligned areas; increasing spread for splits with smaller light-aligned areas
m_poissonScaling [i] = m_resultLightBB [i].Diff().Xy / (100f * (float)Math.Pow(3.0, i - 1));
}
// Combine all splits' BB into one and extend it to include shadow casters closer to light
SSAABB castersLightBB = new SSAABB(float.PositiveInfinity, float.NegativeInfinity);
for (int i = 0; i < c_numberOfSplits; ++i)
{
castersLightBB.Combine(ref m_resultLightBB [i]);
}
// extend Z of the AABB to cover shadow-casters closer to the light
foreach (var obj in objects)
{
if (obj.renderState.toBeDeleted || obj.localBoundingSphereRadius <= 0f ||
!obj.renderState.visible || !obj.renderState.castsShadow)
{
continue;
}
else
{
Vector3 lightAlignedPos = Vector3.Transform(obj.worldBoundingSphereCenter, lightTransform);
Vector3 rad = new Vector3(obj.worldBoundingSphereRadius);
Vector3 localMin = lightAlignedPos - rad;
Vector3 localMax = lightAlignedPos + rad;
if (localMin.Z < castersLightBB.Min.Z)
{
if (OpenTKHelper.RectsOverlap(castersLightBB.Min.Xy,
castersLightBB.Max.Xy,
localMin.Xy,
localMax.Xy))
{
castersLightBB.Min.Z = localMin.Z;
}
}
}
}
// Generate frustum culler from the BB extended towards light to include shadow casters
Matrix4 frustumView, frustumProj;
viewProjFromLightAlignedBB(ref castersLightBB, ref lightTransform, ref lightY,
out frustumView, out frustumProj);
Matrix4 frustumMatrix = frustumView * frustumProj;
FrustumCuller = new SSFrustumCuller(ref frustumMatrix);
}
public override void sortByDepth(ref Matrix4 viewMatrix)
{
if (_numParticles == 0)
{
return;
}
int numAlive = 0;
float prevViewDepth = float.NegativeInfinity;
bool alreadySorted = true;
for (int i = 0; i < _activeBlockLength; ++i)
{
if (isAlive(i))
{
// Do the transform and store z of the result
Vector3 pos = _readElement(_positions, i).Value;
pos = Vector3.Transform(pos, viewMatrix);
float viewDepth = pos.Z;
writeDataIfNeeded(ref _viewDepths, i, viewDepth);
++numAlive;
if (alreadySorted && pos.Z < prevViewDepth)
{
alreadySorted = false;
}
prevViewDepth = viewDepth;
}
else
{
// since we are doing a sort pass later, might as well make it so
// so the dead particles get pushed the back of the arrays
writeDataIfNeeded(ref _viewDepths, i, float.PositiveInfinity);
alreadySorted = false; //force a "sort" to puch dead particles towards the end
}
}
if (!alreadySorted)
{
quickSort(0, _activeBlockLength - 1);
// somewhat hacky workaround for zombie particles that seem to be related to sortByDepth()
_numParticles = numAlive;
_activeBlockLength = _numParticles;
if (_numParticles == 0)
{
_nextIdxToWrite = _nextIdxToOverwrite = 0;
}
else if (_numParticles < _capacity)
{
// update pointers to reflect dead particles that just got sorted to the back
_nextIdxToWrite = _numParticles - 1;
}
#if DEBUG_PARTICLE_SORTING
++debugNumSorted;
#endif
}
else
{
#if DEBUG_PARTICLE_SORTING
++debugNumSortSkipped;
#endif
}
#if DEBUG_PARTICLE_SORTING
System.Console.WriteLine(
"particle data actually sorted "
+ ((float)debugNumSorted / (float)(debugNumSorted + debugNumSortSkipped) * 100f)
+ "% of the time");
#endif
#if false
// set color based on the index of the particle in the arrays
SSAttributeColor[] debugColors =
{
new SSAttributeColor(OpenTKHelper.Color4toRgba(Color4.Red)),
new SSAttributeColor(OpenTKHelper.Color4toRgba(Color4.Green)),
new SSAttributeColor(OpenTKHelper.Color4toRgba(Color4.Blue)),
new SSAttributeColor(OpenTKHelper.Color4toRgba(Color4.Yellow))
};
for (int i = 0; i < m_activeBlockLength; ++i)
{
writeDataIfNeeded(ref m_colors, i, debugColors[i]);
}
#endif
}
public SSShadowMapBase(TextureUnit texUnit, int textureWidth, int textureHeight)
{
if (!OpenTKHelper.areFramebuffersSupported())
{
m_isValid = false;
return;
}
#if false
if (s_numberOfShadowMaps >= c_maxNumberOfShadowMaps)
{
throw new Exception("Unsupported number of shadow maps: "
+ (c_maxNumberOfShadowMaps + 1));
}
#endif
++s_numberOfShadowMaps;
m_frameBufferID = GL.Ext.GenFramebuffer();
if (m_frameBufferID < 0)
{
throw new Exception("gen fb failed");
}
m_textureID = GL.GenTexture();
m_textureWidth = textureWidth;
m_textureHeight = textureHeight;
// bind the texture and set it up...
m_textureUnit = texUnit;
BindShadowMapToTexture();
GL.TexParameter(TextureTarget.Texture2D,
TextureParameterName.TextureMagFilter,
(int)TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D,
TextureParameterName.TextureMinFilter,
(int)TextureMinFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D,
TextureParameterName.TextureWrapS,
(int)TextureWrapMode.ClampToEdge);
GL.TexParameter(TextureTarget.Texture2D,
TextureParameterName.TextureWrapT,
(int)TextureWrapMode.ClampToEdge);
GL.TexImage2D(TextureTarget.Texture2D, 0,
PixelInternalFormat.DepthComponent32f,
m_textureWidth, m_textureHeight, 0,
PixelFormat.DepthComponent, PixelType.Float, IntPtr.Zero);
// done creating texture, unbind
GL.BindTexture(TextureTarget.Texture2D, 0);
// ----------------------------
// now bind the texture to framebuffer..
GL.Ext.BindFramebuffer(FramebufferTarget.DrawFramebuffer, m_frameBufferID);
GL.Ext.BindFramebuffer(FramebufferTarget.ReadFramebuffer, m_frameBufferID);
GL.Ext.FramebufferTexture2D(FramebufferTarget.DrawFramebuffer, FramebufferAttachment.DepthAttachment,
TextureTarget.Texture2D, m_textureID, 0);
//GL.Ext.FramebufferTexture (FramebufferTarget.FramebufferExt, FramebufferAttachment.Color,
//(int)All.None, 0);
GL.Viewport(0, 0, m_textureWidth, m_textureHeight);
GL.DrawBuffer(DrawBufferMode.None);
GL.ReadBuffer(ReadBufferMode.None);
if (!assertFramebufferOK(FramebufferTarget.DrawFramebuffer))
{
throw new Exception("failed to create-and-bind shadowmap FBO");
}
// leave in a sane state...
unbindFramebuffer();
GL.ActiveTexture(TextureUnit.Texture0);
if (!assertFramebufferOK(FramebufferTarget.DrawFramebuffer))
{
throw new Exception("failed to ubind shadowmap FBO");
}
}
private void ComputeProjections(List <SSObject> objects,
SSLightBase light,
Matrix4 cameraView, Matrix4 cameraProj)
{
if (light.GetType() != typeof(SSDirectionalLight))
{
throw new NotSupportedException();
}
SSDirectionalLight dirLight = (SSDirectionalLight)light;
// light-aligned unit vectors
Vector3 lightZ = dirLight.Direction.Normalized();
Vector3 lightX, lightY;
OpenTKHelper.TwoPerpAxes(lightZ, out lightX, out lightY);
// transform matrix from regular space into light aligned space
Matrix4 lightTransform = new Matrix4(
lightX.X, lightX.Y, lightX.Z, 0f,
lightY.X, lightY.Y, lightY.Z, 0f,
lightZ.X, lightZ.Y, lightZ.Z, 0f,
0f, 0f, 0f, 0f
);
// Find AABB of frustum corners in light coordinates
Matrix4 cameraViewProj = cameraView * cameraProj;
SSAABB frustumLightBB = SSAABB.FromFrustum(ref lightTransform, ref cameraViewProj);
bool shrink = false;
SSAABB objsLightBB = new SSAABB(float.PositiveInfinity, float.NegativeInfinity);
#if true
// (optional) scene dependent optimization
// Trim the light-bounding box by the shadow receivers (only in light-space x,y,maxz)
SSFrustumCuller cameraFrustum = new SSFrustumCuller(ref cameraViewProj);
foreach (var obj in objects)
{
// pass through all shadow casters and receivers
if (obj.renderState.toBeDeleted || !obj.renderState.visible ||
!obj.renderState.receivesShadows || obj.localBoundingSphereRadius <= 0f)
{
continue;
}
else if (cameraFrustum.isSphereInsideFrustum(obj.worldBoundingSphere))
{
// determine AABB in light coordinates of the objects so far
shrink = true;
Vector3 lightAlignedPos = Vector3.Transform(obj.worldBoundingSphereCenter, lightTransform);
Vector3 rad = new Vector3(obj.worldBoundingSphereRadius);
Vector3 localMin = lightAlignedPos - rad;
Vector3 localMax = lightAlignedPos + rad;
objsLightBB.UpdateMin(localMin);
objsLightBB.UpdateMax(localMax);
}
}
#endif
// Optimize the light-frustum-projection bounding box by the object-bounding-box
SSAABB resultLightBB = new SSAABB(float.PositiveInfinity, float.NegativeInfinity);
if (shrink)
{
// shrink the XY & far-Z coordinates..
resultLightBB.Min.Xy = Vector2.ComponentMax(frustumLightBB.Min.Xy, objsLightBB.Min.Xy);
resultLightBB.Min.Z = objsLightBB.Min.Z;
resultLightBB.Max = Vector3.ComponentMin(frustumLightBB.Max, objsLightBB.Max);
}
else
{
resultLightBB = frustumLightBB;
}
// View and projection matrices, used by the scene later
viewProjFromLightAlignedBB(ref resultLightBB, ref lightTransform, ref lightY,
out m_shadowViewMatrix, out m_shadowProjMatrix);
// Now extend Z of the result AABB to cover shadow-casters closer to the light inside the
// original box
foreach (var obj in objects)
{
if (obj.renderState.toBeDeleted || !obj.renderState.visible ||
!obj.renderState.castsShadow || obj.localBoundingSphereRadius <= 0f)
{
continue;
}
Vector3 lightAlignedPos = Vector3.Transform(obj.worldBoundingSphereCenter, lightTransform);
Vector3 rad = new Vector3(obj.worldBoundingSphereRadius);
Vector3 localMin = lightAlignedPos - rad;
if (localMin.Z < resultLightBB.Min.Z)
{
Vector3 localMax = lightAlignedPos + rad;
if (OpenTKHelper.RectsOverlap(resultLightBB.Min.Xy,
resultLightBB.Max.Xy,
localMin.Xy,
localMax.Xy))
{
resultLightBB.Min.Z = localMin.Z;
}
}
}
// Generate frustum culler from the BB extended towards light to include shadow casters
Matrix4 frustumView, frustumProj;
viewProjFromLightAlignedBB(ref resultLightBB, ref lightTransform, ref lightY,
out frustumView, out frustumProj);
Matrix4 frustumMatrix = frustumView * frustumProj;
FrustumCuller = new SSFrustumCuller(ref frustumMatrix);
}
//---------------------
public override bool preciseIntersect(ref SSRay localRay, out float nearestLocalRayContact)
{
nearestLocalRayContact = float.PositiveInfinity;
if (useBVHForIntersections)
{
if (_bvh == null && _vbo != null && _ibo != null)
{
// rebuilding BVH
// TODO try updating instead of rebuilding?
_bvh = new SSIndexedMeshTrianglesBVH(_vbo, _ibo);
for (UInt16 triIdx = 0; triIdx < _ibo.numIndices / 3; ++triIdx)
{
_bvh.addObject(triIdx);
}
Console.WriteLine("New BVH MaxDepth = {0}", _bvh.maxDepth);
}
if (_bvh != null)
{
List <ssBVHNode <UInt16> > nodesHit = _bvh.traverseRay(localRay);
foreach (var node in nodesHit)
{
if (!node.IsLeaf)
{
continue;
}
foreach (UInt16 triIdx in node.gobjects)
{
Vector3 v0, v1, v2;
_readTriangleVertices(triIdx, out v0, out v1, out v2);
float contact;
if (OpenTKHelper.TriangleRayIntersectionTest(
ref v0, ref v1, ref v2, ref localRay.pos, ref localRay.dir, out contact))
{
if (contact < nearestLocalRayContact)
{
nearestLocalRayContact = contact;
}
}
}
}
}
}
else
{
_bvh = null;
// slow, tedious intersection test
int numTri = lastAssignedIndices.Length / 3;
for (UInt16 triIdx = 0; triIdx < numTri; ++triIdx)
{
Vector3 v0, v1, v2;
_readTriangleVertices(triIdx, out v0, out v1, out v2);
float contact;
if (OpenTKHelper.TriangleRayIntersectionTest(
ref v0, ref v1, ref v2, ref localRay.pos, ref localRay.dir, out contact))
{
if (contact < nearestLocalRayContact)
{
nearestLocalRayContact = contact;
}
}
}
}
return(nearestLocalRayContact < float.PositiveInfinity);
}
//protected readonly STrailUpdater _updater;
#endregion
public STrailsData(
PositionFunc positionFunc, FwdFunc fwdDirFunc, UpFunc upFunc,
STrailsParameters trailsParams = null)
: base(trailsParams.capacity)
{
this.trailsParams = trailsParams;
this._positionFunc = positionFunc;
this._fwdFunc = fwdDirFunc;
this._upFunc = upFunc;
_headSegmentIdxs = new ushort[trailsParams.numJets];
_tailSegmentIdxs = new ushort[trailsParams.numJets];
_prevSplineIntervalEndPos = new Vector3[trailsParams.numJets];
_prevSplineIntervalEndSlope = new Vector3[trailsParams.numJets];
_localJetOrients = new Matrix4[trailsParams.numJets];
Vector3 pos = _positionFunc();
Vector3 fwd = _fwdFunc();
Vector3 up = _upFunc();
Vector3 right = Vector3.Cross(fwd, up);
Matrix4 globalOrient = new Matrix4(
new Vector4(right, 0f),
new Vector4(up, 0f),
new Vector4(fwd, 0f),
new Vector4(0f, 0f, 0f, 1f));
for (int i = 0; i < trailsParams.numJets; ++i)
{
_headSegmentIdxs[i] = STrailsSegment.NotConnected;
_tailSegmentIdxs[i] = STrailsSegment.NotConnected;
Vector3 localFwd = trailsParams.localJetDir(i);
_localJetOrients[i] = OpenTKHelper.neededRotationMat(-Vector3.UnitZ, localFwd);
jetTxfm(i, ref pos, ref globalOrient,
out _prevSplineIntervalEndPos[i], out _prevSplineIntervalEndSlope[i]);
}
_outerColorEffector = new SSColorKeyframesEffector(trailsParams.outerColorKeyframes)
{
particleLifetime = trailsParams.trailLifetime,
};
addEffector(_outerColorEffector);
_innerColorEffector = new STrailsInnerColorEffector(trailsParams.innerColorKeyframes)
{
particleLifetime = trailsParams.trailLifetime,
};
addEffector(_innerColorEffector);
_innerRatioEffector = new STrailsInnerColorRatioEffector(trailsParams.innerColorRatioKeyframes)
{
particleLifetime = trailsParams.trailLifetime,
};
addEffector(_innerRatioEffector);
_outerRatioEffector = new STrailsOuterColorRatioEffector(trailsParams.outerColorRatioKeyframes)
{
particleLifetime = trailsParams.trailLifetime,
};
addEffector(_outerRatioEffector);
_widthEffector = new STrailsWidthEffector(trailsParams.widthKeyFrames)
{
particleLifetime = trailsParams.trailLifetime,
};
addEffector(_widthEffector);
//_updater = new STrailUpdater(trailsParams);
//addEffector(_updater);
}
public override void Render(SSRenderConfig renderConfig)
{
Matrix4 modelView = this.worldMat * renderConfig.invCameraViewMatrix;
// allow particle system to react to camera/worldview
particleSystem.updateCamera(ref modelView, ref renderConfig.projectionMatrix);
// do we have anything to draw?
if (particleSystem.activeBlockLength <= 0)
{
return;
}
base.Render(renderConfig);
// select either instance shader or instance pssm shader
ISSInstancableShaderProgram instanceShader = renderConfig.instanceShader;
if (renderConfig.drawingShadowMap)
{
if (renderConfig.drawingPssm)
{
renderConfig.instancePssmShader.Activate();
renderConfig.instancePssmShader.UniObjectWorldTransform = this.worldMat;
instanceShader = renderConfig.instancePssmShader;
}
}
else
{
if (!globalBillboarding && base.alphaBlendingEnabled)
{
// Must be called before updating buffers
particleSystem.sortByDepth(ref modelView);
// Fixes flicker issues for particles with "fighting" view depth values
// Also assumes the particle system is the last to be drawn in a scene
GL.DepthFunc(DepthFunction.Lequal);
}
if (depthRead)
{
GL.Enable(EnableCap.DepthTest);
}
else
{
GL.Disable(EnableCap.DepthTest);
}
GL.DepthMask(depthWrite);
// texture binding setup
renderConfig.instanceShader.Activate();
renderConfig.instanceShader.UniObjectWorldTransform = this.worldMat;
if (base.textureMaterial != null)
{
renderConfig.instanceShader.SetupTextures(base.textureMaterial);
}
}
if (globalBillboarding)
{
// Setup "global" billboarding. (entire particle system is rendered as a camera-facing
// billboard and will show the same position of particles from all angles)
modelView = OpenTKHelper.BillboardMatrix(ref modelView);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadMatrix(ref modelView);
}
instanceShader.Activate();
// prepare attribute arrays for draw
GL.PushClientAttrib(ClientAttribMask.ClientAllAttribBits);
prepareAttribute(_posBuffer, instanceShader.AttrInstancePos,
particleSystem.positions);
prepareAttribute(_orientationXYBuffer, instanceShader.AttrInstanceOrientationXY,
particleSystem.orientationsXY);
prepareAttribute(_orientationZBuffer, instanceShader.AttrInstanceOrientationZ,
particleSystem.orientationsZ);
prepareAttribute(_masterScaleBuffer, instanceShader.AttrInstanceMasterScale,
particleSystem.masterScales);
prepareAttribute(_componentScaleXYBuffer, instanceShader.AttrInstanceComponentScaleXY,
particleSystem.componentScalesXY);
prepareAttribute(_componentScaleZBuffer, instanceShader.AttrInstanceComponentScaleZ,
particleSystem.componentScalesZ);
prepareAttribute(_colorBuffer, instanceShader.AttrInstanceColor,
particleSystem.colors);
//prepareAttribute(m_spriteIndexBuffer, instanceShader.AttrInstanceSpriteIndex, m_ps.SpriteIndices);
prepareAttribute(_spriteOffsetUBuffer, instanceShader.AttrInstanceSpriteOffsetU,
particleSystem.spriteOffsetsU);
prepareAttribute(_spriteOffsetVBuffer, instanceShader.AttrInstanceSpriteOffsetV,
particleSystem.SpriteOffsetsV);
prepareAttribute(_spriteSizeUBuffer, instanceShader.AttrInstanceSpriteSizeU,
particleSystem.SpriteSizesU);
prepareAttribute(_spriteSizeVBuffer, instanceShader.AttrInstanceSpriteSizeV,
particleSystem.SpriteSizesV);
// do the draw
mesh.renderInstanced(renderConfig, particleSystem.activeBlockLength, PrimitiveType.Triangles);
GL.PopClientAttrib();
//this.boundingSphere.Render(ref renderConfig);
}
