Print Page - [cgame] Restoring railDisc / Rail Rings

Around 1.30 Quake3 removed raildisc (while implementing a buggier rail spiral effect). This is absent in the GPL source.

Fortunately it was dead simple to re-implement it from scratch.

In cg_weapons.c, add the following after the line "re->oldorigin[2] -= 8;" and before the return statement in the function CG_RailTrail

Code:

	// lei-lei - reimplementing the rail discs that were removed in 1.30
		if (cg_oldRail.integer > 1){

		le = CG_AllocLocalEntity();
		re = &le->refEntity;

		VectorCopy(start, re->origin);
		VectorCopy(end, re->oldorigin);
		le->leType = LE_FADE_RGB;
		le->startTime = cg.time;
		le->endTime = cg.time + cg_railTrailTime.value;
		le->lifeRate = 1.0 / (le->endTime - le->startTime);
	 
		re->shaderTime = cg.time / 1000.0f;
		re->reType = RT_RAIL_RINGS;
		re->customShader = cgs.media.railRingsShader;
		re->shaderRGBA[0] = ci->color1[0] * 255;
		re->shaderRGBA[1] = ci->color1[1] * 255;
		re->shaderRGBA[2] = ci->color1[2] * 255;
		re->shaderRGBA[3] = 255;
	
		le->color[0] = ci->color1[0] * 0.75;
		le->color[1] = ci->color1[1] * 0.75;
		le->color[2] = ci->color1[2] * 0.75;
		le->color[3] = 1.0f;	

		re->origin[2] -= 8;
		re->oldorigin[2] -= 8;

		if (cg_oldRail.integer > 2){		// use the secondary color instead
			re->shaderRGBA[0] = ci->color2[0] * 255;
			re->shaderRGBA[1] = ci->color2[1] * 255;
			re->shaderRGBA[2] = ci->color2[2] * 255;
			re->shaderRGBA[3] = 255;
		
			le->color[0] = ci->color2[0] * 0.75;
			le->color[1] = ci->color2[1] * 0.75;
			le->color[2] = ci->color2[2] * 0.75;
			le->color[3] = 1.0f;	
			}

		}

This should allow the following settings:

cg_oldRail 0 = the 1.30 spiral
cg_oldRail 1 = Core only, as butchered in 1.30
cg_oldRail 2 = pre-1.30 rail discs
cg_oldRail 3 = pre-1.30 rail discs that use 1.30's color2

Also, note that there's a few cvars in the renderer that adjust the size of the rail:

r_railWidth = adjusts the disc size. Default 16; though q3test 1.05 had this set as 128
r_railCoreWidth = adjust the size of the beam. Default 6, q3test 1.05 had this set to 16
r_railSegmentLength = adjusts the length of each disc's gap. Default 32, q3test 1.05 had this set to 64

DISCLAIMER: I did not use any of the old Q3A SDK code as reference for this. This is all clean room.

The old original Q3 rail! Nice! ;D

Waiting for updated OAX/Binaries to try it....

Quote from: fromhell on March 03, 2014, 12:41:07 PM

r_railWidth = adjusts the disc size. Default 16; though q3test 1.05 had this set as 128

Different scale?

Quote

r_railSegmentLength = adjusts the length of each disc's gap. Default 32, q3test 1.05 had this set to 64

Are you sure about changing this default? I can guess lenght 32 instead of 64 doubles the number of polygons to render...

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id Tech 3 => cgame/game/ui => Topic started by: fromhell on March 03, 2014, 12:41:07 PM