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Committed some possible changes: r9334. Scale velocity limit with amount of time "throw" button was held, just like impulse. [REVERTED] r9335. Apply velocity limit to dragged object, add mass of player's arm to mass of dragged object. In case there are not good, simply revert both of them (or one of them separately). |
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More changes (follow-up for velocity limit of dragged object): [REVERTED] r9338. Raise velocity limit when grabbed object is far from the center of the screen. |
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First of all, I have reverted my prior changes in dragging code: r9340. Reverted recent changes to grabber. The changes in throwing code remain. Then I added a whole new mode for grabber: r9346. Added idVec3::ProjectToConvexCone method for "sliding" physics behavior. r9347. Implemented new grabber. (the first commit does not change behavior, only adds utility function) The new grabber is enabled under tdm_drag_new cvar (enabled by default). Its behavior is controlled by cvars like tdm_drag2_XXX. The most important is tdm_drag2_rigid_silentmode: it controls when "silent" mode is used. The silent mode disabled all impulses to other objects and bounce sounds, as well as stims, script events, fx, etc. |
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Started a thread for feedback: https://forums.thedarkmod.com/index.php?/topic/20928-210-new-physics-for-object-manipulation-and-dragging-bodies |
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There is one problem in the new grabber: https://forums.thedarkmod.com/index.php?/topic/20928-210-new-physics-for-object-manipulation-and-dragging-bodies/&do=findComment&comment=466408 Basically, we are supposed to be able to lift rat corpse. Now dragging force is 80% of weight, so player cannot take the corpse off the ground. Just raising the force leads to rat oscillating in the air, so some kind of damping is needed for such ragdolls... |
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Pretty major commit to support lifting rats into air: r9686. Supporting lifting grabbed AF into air with new drag implementation. Now I check for entity's "ground_when_dragged" spawnarg. If it is true, then force/weight is tdm_drag2_af_weight_ratio = 80%. If it is false, then force/weight is tdm_drag2_af_weight_ratio_canlift = 500%. In order to fix oscillations, I did two things when dragged object is fully in-air: 1) Apply force uniformly to all bodies, so that they are not moved relative to each other (normally, force is applied only to the selected body). 2) Temporarily override global (air) friction parameters with 0.5. I had to add some nasty code for the second point: saving/restoring friction coefficients, putting them to savegame file, making sure restore always happens. |
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Added separate code path for rotating rigid objects too. The reason is summarized here: https://forums.thedarkmod.com/index.php?/topic/20907-grabber-improvements/&do=findComment&comment=469460 https://forums.thedarkmod.com/index.php?/topic/21198-beta-testing-210/&do=findComment&comment=469415 The old code slows down rotation of heavy objects (a lot). Aside from general annoyance from such "realistic" approach, when "to-be-applied-in-future" rotation hits 180 degrees, the rotation direction is reversed. That's because the code stores only target orientation of the object, instead of rotation angles to be applied. Now rotation does not depend on object's mass and is pretty fast in general. |
- Anonymous
