Function drawLine

demo/d3d11/imguiGraph.cpp:190–225

static void drawLine(float x0, float y0, float x1, float y1, float r, float fth, unsigned int col)
{
	float dx = x1 - x0;
	float dy = y1 - y0;
	float d = sqrtf(dx*dx + dy*dy);
	if (d > 0.0001f)
	{
		d = 1.0f / d;
		dx *= d;
		dy *= d;
	}
	float nx = dy;
	float ny = -dx;
	float verts[4 * 2];
	r -= fth;
	r *= 0.5f;
	if (r < 0.01f) r = 0.01f;
	dx *= r;
	dy *= r;
	nx *= r;
	ny *= r;

	verts[0] = x0 - dx - nx;
	verts[1] = y0 - dy - ny;

	verts[2] = x0 - dx + nx;
	verts[3] = y0 - dy + ny;

	verts[4] = x1 + dx + nx;
	verts[5] = y1 + dy + ny;

	verts[6] = x1 + dx - nx;
	verts[7] = y1 + dy - ny;

	drawPolygon(verts, 4, fth, col);
}


bool imguiGraphInit(const char* fontpath, const ImguiGraphDesc* desc)