Method R_DrawBeam

client/src/main/java/jake2/client/render/fast/Main.java:1481–1544

R_DrawBeam

(entity_t e)

	 * R_DrawBeam
	 */
	void R_DrawBeam(entity_t e) {
		oldorigin[0] = e.oldorigin[0];
		oldorigin[1] = e.oldorigin[1];
		oldorigin[2] = e.oldorigin[2];

		origin[0] = e.origin[0];
		origin[1] = e.origin[1];
		origin[2] = e.origin[2];

		normalized_direction[0] = direction[0] = oldorigin[0] - origin[0];
		normalized_direction[1] = direction[1] = oldorigin[1] - origin[1];
		normalized_direction[2] = direction[2] = oldorigin[2] - origin[2];

		if (Math3D.VectorNormalize(normalized_direction) == 0.0f)
			return;

		Math3D.PerpendicularVector(perpvec, normalized_direction);
		Math3D.VectorScale(perpvec, e.frame / 2, perpvec);

		for (int i = 0; i < 6; i++) {
			Math3D.RotatePointAroundVector(
				start_points[i],
				normalized_direction,
				perpvec,
				(360.0f / NUM_BEAM_SEGS) * i);

			Math3D.VectorAdd(start_points[i], origin, start_points[i]);
			Math3D.VectorAdd(start_points[i], direction, end_points[i]);
		}

		gl.glDisable(GL_TEXTURE_2D);
		gl.glEnable(GL_BLEND);
		gl.glDepthMask(false);

		float r = (d_8to24table[e.skinnum & 0xFF]) & 0xFF;
		float g = (d_8to24table[e.skinnum & 0xFF] >> 8) & 0xFF;
		float b = (d_8to24table[e.skinnum & 0xFF] >> 16) & 0xFF;

		r *= 1 / 255.0f;
		g *= 1 / 255.0f;
		b *= 1 / 255.0f;

		gl.glColor4f(r, g, b, e.alpha);

		gl.glBegin(GL_TRIANGLE_STRIP);
		
		float[] v;
		
		for (int i = 0; i < NUM_BEAM_SEGS; i++) {
			v = start_points[i];
			gl.glVertex3f(v[0], v[1], v[2]);
			v = end_points[i];
			gl.glVertex3f(v[0], v[1], v[2]);
			v = start_points[(i + 1) % NUM_BEAM_SEGS];
			gl.glVertex3f(v[0], v[1], v[2]);
			v = end_points[(i + 1) % NUM_BEAM_SEGS];
			gl.glVertex3f(v[0], v[1], v[2]);
		}