Method WriteLineVerticesToBuffer

trinity/Tr2CurveLineSet.cpp:182–267

------------------------------------------------------------------------------------------------------ Description: Populate vertex buffer with line data. Attributes: pos1 - start position of line segment col1 - color at start of line segment length1 - how far along the line does this segment start pos2 - end position of segment col2 - end color of segment length2 - ow far along the line does this

//   buffer - the vertex buffer
// ------------------------------------------------------------------------------------------------------
void Tr2CurveLineSet::WriteLineVerticesToBuffer(
	const Vector3& pos1,
	const Color& col1,
	float length1,
	const Vector3& pos2,
	const Color& col2,
	float length2,
	const Vector3& posPrev,
	const Vector3& posNext,
	unsigned int lineID,
	LineVertex* buffer )
{
	// line info
	const LineData* lineData = &m_lines[lineID];

	// direction position hint for the vertexshader
	Vector3 dirOffset = pos2 - pos1;

	uint32_t col1Swizzled = SwizzleColor( col1 );
	uint32_t col2Swizzled = SwizzleColor( col2 );
	uint32_t multiColorSwizzled = SwizzleColor( lineData->multiColor );
	uint32_t overlayColorSwizzled = SwizzleColor( lineData->overlayColor );

	Vector3 animationData( lineData->animationSpeed, lineData->animationScale, (float)lineID );

	// tri0 - v0
	LineVertex& v0 = buffer[0];
	v0.position = pos1;
	v0.lineDir = Vector4( dirOffset, -1.f * m_lineWidthFactor * lineData->width );
	v0.beginEnd = Vector4( 0.f, length1, lineData->multiColorBorder, length2 - length1 );
	v0.nextLineDir = posPrev;
	v0.color = col1Swizzled;
	v0.overrideColor = multiColorSwizzled;
	v0.overlayColor = overlayColorSwizzled;
	v0.animationData = animationData;
	// tri0 - v1
	LineVertex& v1 = buffer[1];
	v1.position = pos1;
	v1.lineDir = Vector4( dirOffset, m_lineWidthFactor * lineData->width );
	v1.beginEnd = Vector4( 0.f, length1, lineData->multiColorBorder, length2 - length1 );
	v1.nextLineDir = posPrev;
	v1.color = col1Swizzled;
	v1.overrideColor = multiColorSwizzled;
	v1.overlayColor = overlayColorSwizzled;
	v1.animationData = animationData;
	// tri0 - v2
	LineVertex& v2 = buffer[2];
	v2.position = pos2;
	v2.lineDir = Vector4( -1.f * dirOffset, -1.f * m_lineWidthFactor * lineData->width );
	v2.beginEnd = Vector4( 1.f, length2, lineData->multiColorBorder, length2 - length1 );
	v2.nextLineDir = posNext;
	v2.color = col2Swizzled;
	v2.overrideColor = multiColorSwizzled;
	v2.overlayColor = overlayColorSwizzled;
	v2.animationData = animationData;
	// tri1 - v0
	LineVertex& v3 = buffer[3];
	v3.position = pos1;