Clean up code, optimize key model

Makefile

@@ -1,3 +1,5 @@
+# [this is a copy of the libnds all-purpose template Makefile]
+
 #---------------------------------------------------------------------------------
 .SUFFIXES:
 #---------------------------------------------------------------------------------

README

@@ -22,7 +22,7 @@ implement a reader (string-read.c) because
 you don't usually have a filesystem available on NDS.
 (i.e. model data is stored directly as text in the game ROM.
 the data-source directory contains the low-poly model files,
-which are "compiled" to source files [*-mdl.c] via the "data2src"
+which are "compiled" to model-data.c via the "data2src"
 script/program).
 
 I then copy-pasted libnds 3D example code by Dovoto to

TODO

@@ -19,10 +19,10 @@
   (small) range. A workaround for this quirk was added to
   model-draw.c; use drawModelWithGL_big(model*) to use this
   fixed version.
-
-- Faster code / optimize
++ Faster code / optimize
 	* key model seems to be the [performance] culprit.
-	  will have to decrease vertex count all over again...
+
+- More optimization ?
 - Add lighting/shininess/antialiasing/you-name-it effects
   to make things nicer
 

bullet.c

@@ -1,8 +1,6 @@
 #include "headers.h"
 #include <math.h>
 
-#define BULLET_YACCEL -1.0
-
 game_obj* newBullet(game_obj* list, float x, float y, float z, float angle)
 {
 	game_obj* bul = newListNode(list);
@@ -30,23 +28,13 @@ void bulletTick(game_obj* bul)
 		deleteNode(bul);
 	}
 
-	/* resulting from a special request,
-	   the bullets have gravity */
-	/*
-		stupid idea
-	if(bul->data[BULLET_YVEL] < BULLET_YACCEL)
-		bul->data[BULLET_YVEL] = BULLET_YACCEL;
-	bul->data[BULLET_YVEL] += BULLET_YACCEL * dtime;
-	movey = bul->data[BULLET_YVEL] * dtime +
-		(BULLET_YACCEL * dtime * dtime) / 2.0;
-	*/
-	#ifdef PC_TARGET
+#ifdef PC_TARGET
 	dirx = (float)sin(bul->data[BULLET_ANGLE] / 360.0 * (2*3.14));
 	dirz = (float)cos(bul->data[BULLET_ANGLE] / 360.0 * (2*3.14));
-	#else
+#else
 	dirx = my_sin(bul->data[BULLET_ANGLE]);
 	dirz = my_cos(bul->data[BULLET_ANGLE]);
-	#endif
+#endif
 
 	bul->data[BULLET_X] += 20 * dirx * dtime;
 	bul->data[BULLET_Y] += movey;

collisions.c

@@ -13,11 +13,6 @@
 #include <stdlib.h>
 #include "headers.h"
 
-float avoidZero(float f)
-{
-	return f;
-}
-
 /* Compares using absolute values, equivalent
    to measuring the magnitude of a 1-dimensional
    vector. Ignores zero-length values as
@@ -99,9 +94,9 @@ float smallestOfThree(float a, float b, float c)
 			 */									\
 												\
 			ratio = smallestOfThree							\
-				(x_offs /avoidZero(node->box.move.x),				\
-				y_offs / avoidZero(node->box.move.y),				\
-				z_offs / avoidZero(node->box.move.z));				\
+				(x_offs / node->box.move.x,					\
+				y_offs / node->box.move.y,					\
+				z_offs / node->box.move.z);					\
 												\
 			/* Cheap way to avoid glitches. Normally,				\
 			   ratio should be between 0 and 1. */					\
@@ -150,7 +145,7 @@ void resolveCollisions(game_obj* objs, void (*handler)(void*, void*))
 	game_obj *node, *node2;
 
 	for(node = objs; node != NULL; node = node->next) {
-		if(node->type == SOLID)  continue;	/* SOLIDs don't move ! */
+		if(node->type == SOLID)  continue;	/* heuristic: SOLIDs don't move ! */
 		for(node2 = objs; node2 != NULL; node2 = node2->next) {
 			if(node != node2 && node->type != NONE && node2->type != NONE) {
 				/* Check if any of the current boxe's