325 lines
9.3 KiB
C++
325 lines
9.3 KiB
C++
// Copyright (C) 2002-2008 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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//
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// created by Dean Wadsworth aka Varmint Dec 31 2007
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#include "CVolumeLightSceneNode.h"
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#include "IVideoDriver.h"
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#include "ISceneManager.h"
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#include "S3DVertex.h"
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#include "os.h"
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namespace irr
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{
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namespace scene
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{
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//! constructor
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CVolumeLightSceneNode::CVolumeLightSceneNode(ISceneNode* parent, ISceneManager* mgr,
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s32 id, const u32 subdivU, const u32 subdivV,
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const video::SColor foot,
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const video::SColor tail,
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const core::vector3df& position,
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const core::vector3df& rotation, const core::vector3df& scale)
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: IVolumeLightSceneNode(parent, mgr, id, position, rotation, scale),
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LPDistance(8.0f), SubdivideU(subdivU), SubdivideV(subdivV),
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FootColour(foot), TailColour(tail),
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LightDimensions(core::vector3df(1.0f, 1.2f, 1.0f))
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{
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#ifdef _DEBUG
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setDebugName("CVolumeLightSceneNode");
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#endif
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Buffer = new SMeshBuffer();
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if (Buffer)
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{
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Buffer->setHardwareMappingHint(EHM_STATIC);
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constructLight();
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}
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}
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CVolumeLightSceneNode::~CVolumeLightSceneNode()
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{
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if (Buffer)
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Buffer->drop();
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}
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void CVolumeLightSceneNode::addToBuffer(const video::S3DVertex& v)
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{
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const s32 tnidx = Buffer->Vertices.linear_reverse_search(v);
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const bool alreadyIn = (tnidx != -1);
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u16 nidx = (u16)tnidx;
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if (!alreadyIn) {
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nidx = Buffer->Vertices.size();
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Buffer->Indices.push_back(nidx);
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Buffer->Vertices.push_back(v);
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} else
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Buffer->Indices.push_back(nidx);
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}
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void CVolumeLightSceneNode::constructLight()
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{
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const core::vector3df lightPoint(0, -(LPDistance*LightDimensions.Y), 0);
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const f32 ax = LightDimensions.X * 0.5f; // X Axis
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const f32 az = LightDimensions.Z * 0.5f; // Z Axis
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Buffer->Vertices.clear();
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Buffer->Vertices.reallocate(6+12*(SubdivideU+SubdivideV));
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Buffer->Indices.clear();
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Buffer->Indices.reallocate(6+12*(SubdivideU+SubdivideV));
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//draw the bottom foot.. the glowing region
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addToBuffer(video::S3DVertex(-ax, 0, az, 0,0,0, FootColour, 0, 1));
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addToBuffer(video::S3DVertex(ax , 0, az, 0,0,0, FootColour, 1, 1));
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addToBuffer(video::S3DVertex(ax , 0,-az, 0,0,0, FootColour, 1, 0));
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addToBuffer(video::S3DVertex(ax , 0,-az, 0,0,0, FootColour, 1, 0));
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addToBuffer(video::S3DVertex(-ax, 0,-az, 0,0,0, FootColour, 0, 0));
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addToBuffer(video::S3DVertex(-ax, 0, az, 0,0,0, FootColour, 0, 1));
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f32 tu = 0.f;
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const f32 tuStep = 1.f/SubdivideU;
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f32 bx = -ax;
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const f32 bxStep = LightDimensions.X * tuStep;
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// Slices in X/U space
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for (u32 i = 0; i <= SubdivideU; ++i)
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{
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// These are the two endpoints for a slice at the foot
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core::vector3df end1(bx, 0.0f, -az);
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core::vector3df end2(bx, 0.0f, az);
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end1 -= lightPoint; // get a vector from point to lightsource
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end1.normalize(); // normalize vector
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end1 *= LightDimensions.Y; // multiply it out by shootlength
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end1.X += bx; // Add the original point location to the vector
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end1.Z -= az;
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// Do it again for the other point.
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end2 -= lightPoint;
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end2.normalize();
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end2 *= LightDimensions.Y;
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end2.X += bx;
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end2.Z += az;
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addToBuffer(video::S3DVertex(bx , 0, az, 0,0,0, FootColour, tu, 1));
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addToBuffer(video::S3DVertex(bx , 0, -az, 0,0,0, FootColour, tu, 0));
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addToBuffer(video::S3DVertex(end2.X , end2.Y, end2.Z, 0,0,0, TailColour, tu, 1));
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addToBuffer(video::S3DVertex(bx , 0, -az, 0,0,0, FootColour, tu, 0));
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addToBuffer(video::S3DVertex(end1.X , end1.Y, end1.Z, 0,0,0, TailColour, tu, 0));
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addToBuffer(video::S3DVertex(end2.X , end2.Y, end2.Z, 0,0,0, TailColour, tu, 1));
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//back side
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addToBuffer(video::S3DVertex(-end2.X , end2.Y, -end2.Z, 0,0,0, TailColour, tu, 1));
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addToBuffer(video::S3DVertex(-bx , 0, -az, 0,0,0, FootColour, tu, 1));
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addToBuffer(video::S3DVertex(-bx , 0, az, 0,0,0, FootColour, tu, 0));
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addToBuffer(video::S3DVertex(-bx , 0, az, 0,0,0, FootColour, tu, 0));
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addToBuffer(video::S3DVertex(-end1.X , end1.Y, -end1.Z, 0,0,0, TailColour, tu, 0));
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addToBuffer(video::S3DVertex(-end2.X , end2.Y, -end2.Z, 0,0,0, TailColour, tu, 1));
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tu += tuStep;
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bx += bxStep;
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}
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f32 tv = 0.f;
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const f32 tvStep = 1.f/SubdivideV;
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f32 bz = -az;
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const f32 bzStep = LightDimensions.Z * tvStep;
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// Slices in Z/V space
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for(u32 i = 0; i <= SubdivideV; ++i)
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{
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// These are the two endpoints for a slice at the foot
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core::vector3df end1(-ax, 0.0f, bz);
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core::vector3df end2(ax, 0.0f, bz);
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end1 -= lightPoint; // get a vector from point to lightsource
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end1.normalize(); // normalize vector
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end1 *= LightDimensions.Y; // multiply it out by shootlength
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end1.X -= ax; // Add the original point location to the vector
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end1.Z += bz;
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// Do it again for the other point.
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end2 -= lightPoint;
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end2.normalize();
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end2 *= LightDimensions.Y;
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end2.X += ax;
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end2.Z += bz;
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addToBuffer(video::S3DVertex(-ax , 0, bz, 0,0,0, FootColour, 0, tv));
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addToBuffer(video::S3DVertex(ax , 0, bz, 0,0,0, FootColour, 1, tv));
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addToBuffer(video::S3DVertex(end2.X , end2.Y, end2.Z, 0,0,0, TailColour, 1, tv));
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addToBuffer(video::S3DVertex(end2.X , end2.Y, end2.Z, 0,0,0, TailColour, 1, tv));
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addToBuffer(video::S3DVertex(end1.X , end1.Y, end1.Z, 0,0,0, TailColour, 0, tv));
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addToBuffer(video::S3DVertex(-ax , 0, bz, 0,0,0, FootColour, 0, tv));
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//back side
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addToBuffer(video::S3DVertex(ax , 0, -bz, 0,0,0, FootColour, 0, tv));
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addToBuffer(video::S3DVertex(-ax , 0, -bz, 0,0,0, FootColour, 1, tv));
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addToBuffer(video::S3DVertex(-end2.X , end2.Y, -end2.Z, 0,0,0, TailColour, 1, tv));
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addToBuffer(video::S3DVertex(-end2.X , end2.Y, -end2.Z, 0,0,0, TailColour, 1, tv));
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addToBuffer(video::S3DVertex(-end1.X , end1.Y, -end1.Z, 0,0,0, TailColour, 0, tv));
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addToBuffer(video::S3DVertex(ax , 0, -bz, 0,0,0, FootColour, 0, tv));
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tv += tvStep;
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bz += bzStep;
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}
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Buffer->recalculateBoundingBox();
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Buffer->Material.MaterialType = video::EMT_ONETEXTURE_BLEND;
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Buffer->Material.MaterialTypeParam = pack_texureBlendFunc( video::EBF_SRC_COLOR, video::EBF_SRC_ALPHA, video::EMFN_MODULATE_1X );
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Buffer->Material.Lighting = false;
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Buffer->Material.ZWriteEnable = false;
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Buffer->setDirty(EBT_VERTEX_AND_INDEX);
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}
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//! renders the node.
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void CVolumeLightSceneNode::render()
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{
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if (!Buffer)
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return;
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video::IVideoDriver* driver = SceneManager->getVideoDriver();
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driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
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driver->setMaterial(Buffer->Material);
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driver->drawMeshBuffer(Buffer);
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}
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//! returns the axis aligned bounding box of this node
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const core::aabbox3d<f32>& CVolumeLightSceneNode::getBoundingBox() const
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{
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return Buffer->BoundingBox;
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}
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void CVolumeLightSceneNode::OnRegisterSceneNode()
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{
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if (IsVisible)
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{
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SceneManager->registerNodeForRendering(this, ESNRP_TRANSPARENT);
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}
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ISceneNode::OnRegisterSceneNode();
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}
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//! returns the material based on the zero based index i. To get the amount
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//! of materials used by this scene node, use getMaterialCount().
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//! This function is needed for inserting the node into the scene hirachy on a
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//! optimal position for minimizing renderstate changes, but can also be used
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//! to directly modify the material of a scene node.
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video::SMaterial& CVolumeLightSceneNode::getMaterial(u32 i)
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{
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return Buffer->Material;
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}
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//! returns amount of materials used by this scene node.
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u32 CVolumeLightSceneNode::getMaterialCount() const
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{
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return 1;
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}
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void CVolumeLightSceneNode::setSubDivideU (const u32 inU)
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{
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SubdivideU = inU;
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constructLight();
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}
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void CVolumeLightSceneNode::setSubDivideV (const u32 inV)
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{
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SubdivideV = inV;
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constructLight();
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}
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void CVolumeLightSceneNode::setFootColour(const video::SColor inColouf)
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{
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FootColour = inColouf;
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constructLight();
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}
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void CVolumeLightSceneNode::setTailColour(const video::SColor inColouf)
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{
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TailColour = inColouf;
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constructLight();
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}
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//! Writes attributes of the scene node.
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void CVolumeLightSceneNode::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const
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{
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ISceneNode::serializeAttributes(out, options);
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out->addFloat("lpDistance", LPDistance);
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out->addInt("subDivideU", SubdivideU);
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out->addInt("subDivideV", SubdivideV);
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out->addColor("footColour", FootColour);
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out->addColor("tailColour", TailColour);
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out->addVector3d("lightDimension", LightDimensions);
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}
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//! Reads attributes of the scene node.
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void CVolumeLightSceneNode::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options)
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{
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LPDistance = in->getAttributeAsFloat("lpDistance");
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LPDistance = core::max_(LPDistance, 8.0f);
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SubdivideU = in->getAttributeAsInt("subDivideU");
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SubdivideU = core::max_(SubdivideU, 1u);
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SubdivideV = in->getAttributeAsInt("subDivideV");
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SubdivideV = core::max_(SubdivideV, 1u);
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FootColour = in->getAttributeAsColor("footColour");
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TailColour = in->getAttributeAsColor("tailColour");
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LightDimensions = in->getAttributeAsVector3d("lightDimension");
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constructLight();
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ISceneNode::deserializeAttributes(in, options);
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}
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//! Creates a clone of this scene node and its children.
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ISceneNode* CVolumeLightSceneNode::clone(ISceneNode* newParent, ISceneManager* newManager)
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{
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if (!newParent)
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newParent = Parent;
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if (!newManager)
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newManager = SceneManager;
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CVolumeLightSceneNode* nb = new CVolumeLightSceneNode(newParent,
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newManager, ID, SubdivideU, SubdivideV, FootColour, TailColour, RelativeTranslation);
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nb->cloneMembers(this, newManager);
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nb->Buffer->Material = Buffer->Material;
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nb->drop();
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return nb;
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}
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} // end namespace scene
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} // end namespace irr
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