From 47f33148829a97b19326eae42eff633e63584454 Mon Sep 17 00:00:00 2001
From: mrb0nk500 <b0nk@b0nk.xyz>
Date: Sat, 12 Oct 2019 18:36:46 -0400
Subject: Remove Per Pixel Collision.

Why? Because it was too hard to actually implement, in
this case.
I will be adding a diff file, in case someone wants to
actually get ppx working.
---
 clld.c       | 81 ++++++++++++++++++------------------------------------------
 test-bitmask | 55 -----------------------------------------
 2 files changed, 24 insertions(+), 112 deletions(-)
 delete mode 100644 test-bitmask

diff --git a/clld.c b/clld.c
index e4c3679..6d6d3a0 100644
--- a/clld.c
+++ b/clld.c
@@ -13,8 +13,10 @@
 #include <string.h>
 #include <unistd.h>
 #define TERASGN(a, b, c, d) (a) ? (b = d) : (c = d)
+#define max(a, b) (abs(a-b)+(a+b))/2
+#define min(a, b) -max(-a, -b)
 
-enum {THM, AABB, PPX };
+enum {THM, AABB};
 
 /* Collision type */
 int colltype = -1;
@@ -72,8 +74,8 @@ int main(int argc, char **argv) {
 		double d1;
 		double d2;
 
-		/* Bitmask used in Per Pixel, and Tile Heightmap collision. */
-		uint8_t **bitmask;
+		/* Heightmap, used in Tile Heightmap collision. */
+		uint8_t *heightmap;
 
 		/* X axis collision. */
 		unsigned int clx : 1;
@@ -117,32 +119,11 @@ int main(int argc, char **argv) {
 		 */
 		tmp.w = atoi(strtok(buf, ","));
 		tmp.h = atoi(strtok(NULL, "\n"));
-		/* Initialize y axis of bitmask. */
-		if (colltype == THM || colltype == PPX)
-			tmp.bitmask = malloc(sizeof(uint8_t *)*tmp.h);
-		/* Initialize x axis of bitmask. */
-		if (colltype == PPX)
-			for(unsigned int i = 0; i<tmp.h; i++)
-				tmp.bitmask[i] = malloc(sizeof(uint8_t)*tmp.w);
-		/* Get Per Pixel data. */
-		if (colltype == PPX) {
-			for (unsigned int j = 0; j<tmp.h; j++) {
-				buf = NULL;
-				size_t newidth = getline(&buf, &size, stdin);
-				/*
-				 * Format is:
-				 *
-				 * 000111000... Until bit w-1.
-				 * .
-				 * .
-				 *
-				 * Until bit h-1.
-				 */
-				tmp.w = (newidth >= tmp.w) ? tmp.w : newidth;
-				for (unsigned int i = 0; i <tmp.w; i++)
-					tmp.bitmask[j][i] = buf[i] - '0';
-			}
-		}
+		/*
+		 * Initialize heightmap.
+		 */
+		if (colltype == THM && coll)
+			tmp.heightmap = malloc(sizeof(uint8_t *)*tmp.w);
 		/* Get Tile Heightmap data. */
 		if (colltype == THM && coll) {
 			/* Get vertical flip flag */
@@ -161,36 +142,25 @@ int main(int argc, char **argv) {
 			for (unsigned int i = 0; i <tmp.w; i++) {
 				char *tmptok = strtok((i == 0) ? buf : NULL,",");
 				tmptok = (tmptok == NULL) ? strtok(NULL,"\n") : tmptok;
-				tmp.bitmask[i] = (uint8_t *)((atoi(tmptok) <= tmp.h) ? atoi(tmptok) : tmp.h);
+				tmp.heightmap[i] = (uint8_t *)((atoi(tmptok) <= tmp.h) ? atoi(tmptok) : tmp.h);
 				hmpeak = (atoi(tmptok)+1 >= hmpeak) ? atoi(tmptok)+1 : hmpeak;
 			}
 
 		}
 
 		/*
-		 * Copy width, height, and bitmask over
-		 * to either the Cursor, or the Floor.
+		 * Copy width, and height to either
+		 * the Cursor, or the Floor.
 		 */
 		(coll) ? (floor.w = tmp.w) : (cursor.w = tmp.w);
 		(coll) ? (floor.h = tmp.h) : (cursor.h = tmp.h);
-		(coll) ? (floor.bitmask = tmp.bitmask) : (cursor.bitmask = tmp.bitmask);
+		if (coll)
+			floor.heightmap = tmp.heightmap;
 		/* Debugging stuff. */
 		if (verbose >= 1) {
 			if (colltype == THM && coll)
 				 for (unsigned int i = 0; i<floor.h; i++)
-					 printf((i < floor.h-1 && i % 16 != 0 || i == 0) ? "%u, " : ("%u\n"), floor.bitmask[i]);
-
-
-			if (colltype == PPX) {
-				for (unsigned int j = 0; j<((coll) ? floor.h : cursor.h); j++) {
-					for (unsigned int i = 0; i<((coll) ? floor.w : cursor.w); i++)
-						if((coll) ? floor.bitmask[j][i] : cursor.bitmask[j][i])
-							printf("%u", (coll) ? floor.bitmask[j][i] : cursor.bitmask[j][i]);
-						else
-							printf(" ");
-					printf("\n");
-				}
-			}
+					 printf((i < floor.h-1 && i % 16 != 0 || i == 0) ? "%u, " : ("%u\n"), floor.heightmap[i]);
 		}
 
 
@@ -259,9 +229,9 @@ int main(int argc, char **argv) {
 				if (cursor.clx) {
 					if (cursor.a2-floor.a1 < 0 || cursor.a2-floor.a1 > floor.w) {
 						/* Is the Cursor coming from the left? */
-						if (cursor.a2 > floor.a1-(int)cursor.xvel-1 && floor.b2-cursor.b2 < (int)floor.bitmask[0] && !floor.flp && cursor.xvel > 0)
+						if (cursor.a2 > floor.a1-(int)cursor.xvel-1 && floor.b2-cursor.b2 < (int)floor.heightmap[0] && !floor.flp && cursor.xvel > 0)
 							cursor.pos.x = (floor.pos.x-(int)cursor.xvel)-cursor.w-1;
-						else if (cursor.a1 < (floor.a2-cursor.w)-(int)cursor.xvel+1 && floor.b2-cursor.b2 < (int)floor.bitmask[floor.w-1] && !floor.flp && cursor.xvel < 0)
+						else if (cursor.a1 < (floor.a2-cursor.w)-(int)cursor.xvel+1 && floor.b2-cursor.b2 < (int)floor.heightmap[floor.w-1] && !floor.flp && cursor.xvel < 0)
 							cursor.pos.x = (floor.a2-cursor.w)-(int)cursor.xvel+1;
 						/* Is the Cursor coming from the right? */
 						if (cursor.a1 < (floor.a2-cursor.w)-(int)cursor.xvel+1 && cursor.b1-floor.b1 < 0 && floor.flp && cursor.xvel < 0)
@@ -274,7 +244,7 @@ int main(int argc, char **argv) {
 				if (cursor.cly) {
 					if (cursor.a2-floor.a1 < floor.w) {
 						cursor.yvel = 0;
-						newy = (int)floor.bitmask[cursor.a2-floor.a1];
+						newy = (int)floor.heightmap[cursor.a2-floor.a1];
 						/* Is the Floor, really a floor? */
 						if (cursor.b2 > (floor.b2-hmpeak)-(int)cursor.yvel && floor.b2-cursor.b2 >= 0 && !floor.flp)
 							cursor.pos.y = ((floor.b2-cursor.h)-newy)-(int)cursor.yvel;
@@ -318,9 +288,9 @@ int main(int argc, char **argv) {
 				if (cursor.clx) {
 					if (cursor.c2-floor.c1 < -1 || cursor.c2-floor.c1 > floor.w) {
 						/* Is the Cursor coming from the left? */
-						if (cursor.c2 > floor.c1-cursor.xvel-1 && floor.d2-cursor.d2 < (int)floor.bitmask[0] && !floor.flp && cursor.xvel > 0)
+						if (cursor.c2 > floor.c1-cursor.xvel-1 && floor.d2-cursor.d2 < (int)floor.heightmap[0] && !floor.flp && cursor.xvel > 0)
 							cursor.pos.fx = (floor.pos.x-cursor.xvel)-cursor.w-1;
-						else if (cursor.c1 < (floor.c2-cursor.w)-cursor.xvel+1 && floor.d2-cursor.d2 < (int)floor.bitmask[floor.w-1] && !floor.flp && cursor.xvel < 0)
+						else if (cursor.c1 < (floor.c2-cursor.w)-cursor.xvel+1 && floor.d2-cursor.d2 < (int)floor.heightmap[floor.w-1] && !floor.flp && cursor.xvel < 0)
 							cursor.pos.fx = (floor.c2-cursor.w)-cursor.xvel+1;
 						/* Is the Cursor coming from the right? */
 						if (cursor.c1 < (floor.c2-cursor.w)-cursor.xvel+1 && cursor.d1-floor.d1 < 0 && floor.flp && cursor.xvel < 0)
@@ -333,7 +303,7 @@ int main(int argc, char **argv) {
 				if (cursor.cly) {
 					if (cursor.c2-floor.c1 < floor.w) {
 						cursor.yvel = 0;
-						newy = (int)floor.bitmask[(int)cursor.c2-(int)floor.c1];
+						newy = (int)floor.heightmap[(int)cursor.c2-(int)floor.c1];
 						/* Is the Floor, really a floor? */
 						if (cursor.d2 > (floor.d2-hmpeak)-cursor.yvel && floor.d2-cursor.d2 >= 0 && !floor.flp)
 							cursor.pos.fy = ((floor.d2-cursor.h)-newy)-cursor.yvel;
@@ -436,11 +406,8 @@ int main(int argc, char **argv) {
 	uint8_t a = 0;
 	unsigned int i = 0;
 	free(buf);
-	if(colltype == THM || colltype == PPX) {
-		while (!a && colltype == PPX)
-			(i<tmp.h) ? (free(tmp.bitmask[i]), ++i) : (a=1);
-		free(cursor.bitmask);
-		free(floor.bitmask);
+	if(colltype == THM) {
+		free(floor.heightmap);
 	}
 	fflush(stdout);
 
diff --git a/test-bitmask b/test-bitmask
deleted file mode 100644
index 42884fe..0000000
--- a/test-bitmask
+++ /dev/null
@@ -1,55 +0,0 @@
-2
-18, 34
-000000000000000000
-000000000000110000
-000000000001010000
-000000000010010000
-000000000010010000
-000000000010010000
-000000001111110000
-000000010000010000
-000000100000010000
-000001000000010000
-000001000000010000
-000010000000010000
-000010000000010000
-000001000000010000
-000001000000010000
-000000100000010000
-000000111111110000
-000000100000010000
-000001000111010000
-000001000101010000
-000001000101010000
-000001000111010000
-000001000101010000
-000001001001010000
-000001001101010000
-000000100111010000
-000000100000010000
-000000100000010000
-000000111111110000
-000000001001000000
-000000001111000000
-000000011001000000
-000000010001000000
-000000011111000000
-1, 2, 3
-16, 16
-0000000000000001
-0000000000000011
-0000000000000101
-0000000000001001
-0000000000010001
-0000000000100001
-0000000001000001
-0000000010000001
-0000000100000001
-0000001000000001
-0000010000000001
-0000100000000001
-0001000000000001
-0010000000000001
-0100000000000001
-1111111111111111
-4, 5, 6
-- 
cgit v1.2.3-13-gbd6f