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path: root/engines/bladerunner/fog.cpp
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#include "bladerunner/fog.h"

namespace BladeRunner
{
	Fog::Fog()
	{
	}

	Fog::~Fog()
	{
	}

	int Fog::readCommon(Common::ReadStream* stream)
	{
		int offset = stream->readUint32LE();
		stream->read(_name, 20);
		_fogColor.r = stream->readFloatLE();
		_fogColor.g = stream->readFloatLE();
		_fogColor.b = stream->readFloatLE();
		_fogDensity = stream->readFloatLE();
		return offset;
	}


	void Fog::readAnimationData(Common::ReadStream* stream, int size)
	{
		_animatedParameters = stream->readUint32LE();
		_animationData = new float[size / sizeof(float)];
		stream->read(_animationData, size);
		
		_m11ptr = _animationData;
		_m12ptr = _m11ptr + (_animatedParameters & 0x1 ? _framesCount : 1);
		_m13ptr = _m12ptr + (_animatedParameters & 0x2 ? _framesCount : 1);
		_m14ptr = _m13ptr + (_animatedParameters & 0x4 ? _framesCount : 1);
		_m21ptr = _m14ptr + (_animatedParameters & 0x08 ? _framesCount : 1);
		_m22ptr = _m21ptr + (_animatedParameters & 0x10 ? _framesCount : 1);
		_m23ptr = _m22ptr + (_animatedParameters & 0x20 ? _framesCount : 1);
		_m24ptr = _m23ptr + (_animatedParameters & 0x40 ? _framesCount : 1);
		_m31ptr = _m24ptr + (_animatedParameters & 0x80 ? _framesCount : 1);
		_m32ptr = _m31ptr + (_animatedParameters & 0x100 ? _framesCount : 1);
		_m33ptr = _m32ptr + (_animatedParameters & 0x200 ? _framesCount : 1);
		_m34ptr = _m33ptr + (_animatedParameters & 0x400 ? _framesCount : 1);

		setupFrame(0);
	}

	void Fog::reset()
	{
	}

	void Fog::setupFrame(int frame)
	{
		int offset = frame % _framesCount;
		_matrix._m[0][0] = (_animatedParameters & 0x1 ? _m11ptr[offset] : *_m11ptr);
		_matrix._m[0][1] = (_animatedParameters & 0x2 ? _m12ptr[offset] : *_m12ptr);
		_matrix._m[0][2] = (_animatedParameters & 0x4 ? _m13ptr[offset] : *_m13ptr);
		_matrix._m[0][3] = (_animatedParameters & 0x8 ? _m14ptr[offset] : *_m14ptr);
		_matrix._m[1][0] = (_animatedParameters & 0x10 ? _m21ptr[offset] : *_m21ptr);
		_matrix._m[1][1] = (_animatedParameters & 0x20 ? _m22ptr[offset] : *_m22ptr);
		_matrix._m[1][2] = (_animatedParameters & 0x40 ? _m23ptr[offset] : *_m23ptr);
		_matrix._m[1][3] = (_animatedParameters & 0x80 ? _m24ptr[offset] : *_m24ptr);
		_matrix._m[2][0] = (_animatedParameters & 0x100 ? _m31ptr[offset] : *_m31ptr);
		_matrix._m[2][1] = (_animatedParameters & 0x200 ? _m32ptr[offset] : *_m32ptr);
		_matrix._m[2][2] = (_animatedParameters & 0x400 ? _m33ptr[offset] : *_m33ptr);
		_matrix._m[2][3] = (_animatedParameters & 0x800 ? _m34ptr[offset] : *_m34ptr);
		_inverted = invertMatrix(_matrix);
	}

	void FogCone::read(Common::ReadStream* stream, int framesCount)
	{
		_framesCount = framesCount;
		int size = readCommon(stream);
		_parameter1 = stream->readFloatLE();
		readAnimationData(stream, size - 52);
	}

	void FogSphere::read(Common::ReadStream* stream, int framesCount)
	{
		_framesCount = framesCount;
		int size = readCommon(stream);
		_parameter1 = stream->readFloatLE();
		readAnimationData(stream, size - 52);
	}

	void FogBox::read(Common::ReadStream* stream, int framesCount)
	{
		_framesCount = framesCount;
		int size = readCommon(stream);
		_parameter1 = stream->readFloatLE();
		_parameter2 = stream->readFloatLE();
		_parameter3 = stream->readFloatLE();
		readAnimationData(stream, size - 60);
	}
}