C++ (Cpp) Matrix33::TransformVector Examples

Example #1

File: AIDebugRenderer.cpp Project: aronarts/FireNET

//====================================================================
// DebugDrawWireFOVCone
//====================================================================
void CAIDebugRenderer::DrawWireFOVCone(const Vec3& vPos, const Vec3& vDir, float fRadius, float fFOV, const ColorB& color)
{
	const unsigned int npts = 32;
	const unsigned int npts2 = 16;
	Vec3	points[npts];
	Vec3	pointsx[npts2];
	Vec3	pointsy[npts2];

	Matrix33	base;
	base.SetRotationVDir(vDir);

	float coneRadius = sinf(fFOV) * fRadius;
	float coneHeight = cosf(fFOV) * fRadius;

	for (unsigned int i = 0; i < npts; i++)
	{
		float	a = ((float)i / (float)npts) * gf_PI2;
		float rx = cosf(a) * coneRadius;
		float ry = sinf(a) * coneRadius;
		points[i] = vPos + base.TransformVector(Vec3(rx, coneHeight, ry));
	}

	for (unsigned int i = 0; i < npts2; i++)
	{
		float	a = -fFOV + ((float)i / (float)(npts2-1)) * (fFOV*2);
		float rx = sinf(a) * fRadius;
		float ry = cosf(a) * fRadius;
		pointsx[i] = vPos + base.TransformVector(Vec3(rx, ry, 0));
		pointsy[i] = vPos + base.TransformVector(Vec3(0, ry, rx));
	}

	DrawPolyline(points, npts, true, color);
	DrawPolyline(pointsx, npts2, false, color);
	DrawPolyline(pointsy, npts2, false, color);

	DrawLine(points[0], color, vPos, color);
	DrawLine(points[npts/4], color, vPos, color);
	DrawLine(points[npts/2], color, vPos, color);
	DrawLine(points[npts/2+npts/4], color, vPos, color);
}