[video output=day043 member=cmuratori stream_platform=twitch stream_username=handmade_hero project=code title="The Equations of Motion" vod_platform=youtube id=LoTRzRFEk5I annotator=abnercoimbre annotator=schme annotator=theinternetftw]
[01:02][Intro to equations of motion.]
[2:53][Recap of yesterday's stream.]
[5:08][Motion in-depth: rigid body dynamics.]
[9:15][Linear dynamics.]
[13:53][Fundamental equation of motion.]
[17:55][Revisiting vectors.]
[23:50][How we computed motion.]
[25:35][Some calculus.]
[28:57][Computing motion differently.]
[36:31][How it's currently done in the code.]
[37:10][How we want to change it for our new equations.]
[40:17][A talk on delta time.]
[42:46][Piece-wise functions.]
[43:35][Implementation.]
[49:13][A look at the game now. We notice player has no friction.]
[51:22][Implementing some friction.]
[58:26][Closing remarks.]
[1:00:40][Q&A][:speech]
[1:01:23][Why use real physics and not something custom you can handtune?]
[1:06:59][Why not add an opposite directional deceleration when collisions occur?]
[1:07:29][Are you concerned that actual physics will retract from the beauty and elegance of the worlds greatest jump code?]
[1:08:06][What would you need to store if you wanted to rewind time ala Braid?]
[1:12:53][Is the character a bitmap?]
[1:13:22][Are we going to normalise the vector from the input, instead of having a special case for diagonals?]
[1:14:01][Will there be a map function to help determine terrain for friction and collisions?]
[1:14:37][Why v2 instead of vec2 or vector2?]
[1:15:13][Why not break the code into smaller functions?]
[1:16:36][Shouldn't you use a max speed variable?]
[1:17:32][Someone: Friction negative acceleration based on current velocity would feel better]
[1:18:06][Can you derive the 1/2at^2 part of the position equation again?]
[1:23:54][Do you think something like bullet or box2d for player movement is appropriate?]
[1:25:38][When would you use other integration methods?]
[1:34:20][Will we use rigid body even after the hero is bouncy and all that?]
[1:35:00][Correction on question from someone]
[1:35:49][If we had terrain (ice or mud), we could have an easy convincing example]
[/video]
