g_mod_physics CPMA
// these values match CPMA

// CPMA uses gravity 800 but the strength of Q3 gravity is frametime-dependent.
// It also differs slightly between ascending and descending, which we don't attempt to replicate.
// Modern CPMA has frametime-independent physics that ~match 125fps frametime-dependent.
// DeFRaG still has frametime-dependent physics and DFWC rules mandate 125fps.
// 125 * round(800/125) = 750 simulates 125fps Q3 gravity in Xonotic,
// tested mathematically by k9 and ingame with printf by bones_was_here.

// Jump height:
// Taking into account the effect of velocity snapping, a general formula for origin.z k frames after jumping can be derived:
// kT(270 + (round(gT) - GT)/2) - 1/2 k^2 T round(gT)
// Inputting g=750, T=1/125 and solving on the 45th frame, we find that the jump height in Quake 3 is 48.528 units.
// Q3 test results: 48.527999872 in every test (at end of frame).
// Xonotic test results: 48.6 as expected by (270^2)/(2*750) (see: physicsX.cfg)

// Jump distance/duration:
// The above formula can also be used to calculate that landing in Q3 occurs after 89.93333... 8ms frames,
// for a duration of 720ms at end of frame, as predicted by (2*270)/750 (see: physicsX.cfg),
// so the expected distance is 230.4 units at 320ups.
// Q3 test results: 230.405274 230.405274 230.404723 230.404969 (at end of frame when ONGROUND is set).
// Xonotic test results: 230.39637 in every test (Xonotic can set ONGROUND earlier in the frame, when the collision occurs).

sv_gravity 750

sv_maxspeed 320
sv_maxairspeed 320
sv_stopspeed 100
sv_accelerate 15 // from cpm1_dev_docs
sv_airaccelerate 1
// The cpm1_dev_docs.zip (only CPMA source code release) used friction 8,
// but friction is 6 in all ~modern CPMA releases, and in DeFRaG CPM.
sv_friction 6
edgefriction 1
sv_stepheight 18
sv_jumpvelocity 270
sv_jumpvelocity_crouch 0
sv_wateraccelerate 4
sv_waterfriction 1
sv_airaccel_sideways_friction 0
sv_airaccel_qw 1
sv_airaccel_qw_stretchfactor 0
sv_airstopaccelerate 2.5   // from cpm1_dev_docs
sv_airstrafeaccelerate 70  // from cpm1_dev_docs strafeaccelerate
sv_maxairstrafespeed 30    // from cpm1_dev_docs wishspeed
sv_airstrafeaccel_qw 0
sv_aircontrol 150          // from cpm1_dev_docs
sv_aircontrol_penalty 0
sv_aircontrol_power 2
sv_aircontrol_backwards 0
sv_aircontrol_sidewards 0
sv_airspeedlimit_nonqw 0
sv_warsowbunny_turnaccel 0
sv_warsowbunny_accel 0.1593
sv_warsowbunny_topspeed 925
sv_warsowbunny_backtosideratio 0.8
sv_friction_on_land 0
sv_friction_slick 0
sv_doublejump 0
// match the downhill ramp jumping behaviour of CPMA
sv_jumpspeedcap_min 0
sv_jumpspeedcap_max ""
// CPMA has ramp jumping
sv_jumpspeedcap_max_disable_on_ramps 1
g_teleport_maxspeed 400
g_teleport_minspeed 400
sv_track_canjump 1
sv_gameplayfix_stepdown_maxspeed 0
g_movement_highspeed_q3_compat 1