kdrnic’s gists

kdrnic / jsKart.html

Created April 19, 2018 02:00

	<html>
	<head>
	<script src="jsKart.js"></script>
	</head>
	<body onload="Init()">
	<center>
	<canvas id="screen" width="640" height="480" style="border:solid 1px;"></canvas><br>
	<canvas id="track" width="1448" height="1448" style="display: none;"></canvas><br>
	</center>
	</body>

kdrnic / game.log

Last active April 21, 2018 03:27

	FF = front face (relative to split plane)
	BF = back face (also rtsp)
	bad split face = face given to split face function was already bad
	bad split faces = generated faces are bad (this log ommits bad faces created from a face already bad)
	in DZZD, ZDDZ, etc: D = default, Z = zero, M = minus, P = plus
	Default = vertex added was not intersection
	Zero = vertex was not considered too close to either end of edge
	Minus = vertex was too close to point A of edge
	Plus = vertex was too close to point B of edge

kdrnic / rvface_fromsplitbox.c

Last active April 25, 2018 20:02

	void rvface_fromsplitbox(const mplane plane, const vec3 min, const vec3 max, rvface out)
	{
	int i;

	out->num_verts = 0;

	for(i = 0; i < 8; i++){
	//Calc an edge parallel to either X axis or Y axis
	vec3 a = {
	(i & 3) ? min->x : (i & 1) ? min->x : max->x,

kdrnic / boxslice.c

Last active April 26, 2018 03:33

	void rvface_boxslice(const mplane plane, const vec3 min, const vec3 max, rvface out)
	{
	int potato[256] = {0};
	int i, j, k, l;
	int potato2[256] = {0};
	/*
	Bitfield representing planes on which each edge lies
	+Z-Z+Y-Y+X-X
	b5b4b3b2b1b0
	*/

kdrnic / gist:3e70efa97531eae8b5d36e60d3330aaa

Created April 26, 2018 19:47

	//Basic plane equation
	P . n + d = 0

	//Therefore, 3 plane equations
	X * n1x + Y * n1y + Z * n1z + d1 = 0
	X * n2x + Y * n2y + Z * n2z + d2 = 0
	X * n3x + Y * n3y + Z * n3z + d3 = 0

	//Isolate X in 1st eq
	Y * n1y + Z * n1z + d1 = -X * n1x

kdrnic / boxslice.c

Last active April 26, 2018 23:26

	/*
	This function works in the following manner:
	-Find any 4 planes with which splitting plane is not parallel
	-Always generate a quad with those 4 planes as sides
	-Split quad using rvface_split and all other planes
	*/
	void rvface_boxslice(const mplane plane, const vec3 min, const vec3 max, rvface out)
	{
	//Planes for the box
	//Note max_planes don't point inside the box

kdrnic / testgist.garbage

Created May 1, 2018 22:59

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kdrnic / main.c

Created May 2, 2018 04:28

	#include <allegro.h>
	#include <stdio.h>

	int main(int argc, char ** argv)
	{
	char lin[1024] = "v 0.123 0.456 -0.789";
	float x, y, z;
	allegro_init();
	if(argc > 1) install_keyboard();
	sscanf(lin, "%*s %f %f %f", &x, &y, &z);

kdrnic / arr.h

Last active May 6, 2018 01:49

Dynamic array implementation for C

	/*
	Generic dynamic array implementation
	Usage example:
	foo_arr.h
	001 #ifndef FOO_ARR_H
	002 #define FOO_ARR_H
	003 #define ARR_STRUCT_NAME foo_arr
	004 #define ARR_TYPE foo
	005 #define ARR_ADD_PREFIX(t) foo_arr_ ## t
	006 #include "arr.h"

kdrnic / raster.c

Last active May 23, 2018 14:59

	#include <allegro.h>

	#include <math.h>
	#include <stdio.h>

	#include "raster.h"
	/*
	Illustration of the two subtriangles

	-verts[0] -vs[0]=ve[0]