Cube  Diff

// rendercubes.cpp: sits in between worldrender.cpp and rendergl.cpp and fills
// the vertex array for different cube surfaces.

#include "cube.h"

static struct vertex *verts = NULL;
int curvert;
static int curmaxverts = 10000;

void
setarraypointers()
{
	glVertexPointer(3, GL_FLOAT, sizeof(struct vertex), &verts[0].x);
	glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(struct vertex), &verts[0].r);
	glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), &verts[0].u);
}

void
reallocv()
{
	verts =
	    OFResizeMemory(verts, (curmaxverts *= 2), sizeof(struct vertex));
	curmaxverts -= 10;
	setarraypointers();
}

// generating the actual vertices is done dynamically every frame and sits at
// the leaves of all these functions, and are part of the cpu bottleneck on
// really slow machines, hence the macros.

#define vertcheck()                         \
	{                                   \
		if (curvert >= curmaxverts) \
			reallocv();         \
	}

#define vertf(v1, v2, v3, ls, t1, t2)                 \
	{                                             \
		struct vertex *v = &verts[curvert++]; \
		v->u = t1;                            \
		v->v = t2;                            \
		v->x = v1;                            \
		v->y = v2;                            \
		v->z = v3;                            \
		v->r = ls->r;                         \
		v->g = ls->g;                         \
		v->b = ls->b;                         \
		v->a = 255;                           \
	}

#define vert(v1, v2, v3, ls, t1, t2)                                      \
	{                                                                 \
		vertf((float)(v1), (float)(v2), (float)(v3), ls, t1, t2); \
	}

	}
void
finishstrips()
{
	stripend();
}

static struct sqr sbright, sdark;
VAR(lighterror, 1, 8, 100);

// floor/ceil quads
void
render_flat(int wtex, int x, int y, int size, int h, struct sqr *l1,
    struct sqr *l2, struct sqr *l3, struct sqr *l4, bool isceil)
{
	vertcheck();
	if (showm) {
		l3 = l1 = &sbright;
		l4 = l2 = &sdark;
	}

		vert(x + size, h, y + size, l3, xo + xs, yo + ys);
	}

	oy = y;
	nquads++;
}

// floor/ceil quads on a slope
void
render_flatdelta(int wtex, int x, int y, int size, float h1, float h2, float h3,
    float h4, struct sqr *l1, struct sqr *l2, struct sqr *l3, struct sqr *l4,
    bool isceil)
{
	vertcheck();
	if (showm) {
		l3 = l1 = &sbright;
		l4 = l2 = &sdark;
	}

		    (float)x + size, h3, (float)y + size, l3, xo + xs, yo + ys);
	}

	oy = y;
	nquads++;
}

// floor/ceil tris on a corner cube
void
render_2tris(struct sqr *h, struct sqr *s, int x1, int y1, int x2, int y2,
    int x3, int y3, struct sqr *l1, struct sqr *l2, struct sqr *l3)
{
	stripend();
	vertcheck();

	int sx, sy;
	int gltex = lookuptexture(h->ftex, &sx, &sy);
	float xf = TEXTURESCALE / sx;

	vertf((float)x2, h->ceil, (float)y2, l2, xf * x2, yf * y2);
	vertf((float)x1, h->ceil, (float)y1, l1, xf * x1, yf * y1);
	addstrip(gltex, curvert - 3, 3);
	nquads++;
}

void
render_tris(int x, int y, int size, bool topleft, struct sqr *h1,
    struct sqr *h2, struct sqr *s, struct sqr *t, struct sqr *u, struct sqr *v)
{
	if (topleft) {
		if (h1)
			render_2tris(h1, s, x + size, y + size, x, y + size, x,
			    y, u, v, s);
		if (h2)
			render_2tris(h2, s, x, y, x + size, y, x + size,
			    y + size, s, t, v);
	} else {
		if (h1)
			render_2tris(
			    h1, s, x, y, x + size, y, x, y + size, s, t, u);
		if (h2)
			render_2tris(h2, s, x + size, y, x + size, y + size, x,
			    y + size, t, u, v);
	}
}

void
render_square(int wtex, float floor1, float floor2, float ceil1, float ceil2,
    int x1, int y1, int x2, int y2, int size, struct sqr *l1, struct sqr *l2,
    bool flip) // wall quads
{
	stripend();
	vertcheck();
	if (showm) {
		l1 = &sbright;
		l2 = &sdark;

int wx1, wy1, wx2, wy2;

VAR(watersubdiv, 1, 4, 64);
VARF(waterlevel, -128, -128, 127,
    if (!noteditmode()) hdr.waterlevel = waterlevel);

static inline void
vertw(int v1, float v2, int v3, struct sqr *c, float t1, float t2, float t)
{
	vertcheck();
	vertf((float)v1, v2 - (float)sin(v1 * v3 * 0.1 + t) * 0.2f, (float)v3,
	    c, t1, t2);
}

inline float

	float xf = TEXTURESCALE / sx;
	float yf = TEXTURESCALE / sy;
	float xs = watersubdiv * xf;
	float ys = watersubdiv * yf;
	float t1 = lastmillis / 300.0f;
	float t2 = lastmillis / 4000.0f;

	struct sqr dl;
	dl.r = dl.g = dl.b = 255;

	for (int xx = wx1; xx < wx2; xx += watersubdiv) {
		for (int yy = wy1; yy < wy2; yy += watersubdiv) {
			float xo = xf * (xx + t2);
			float yo = yf * (yy + t2);
			if (yy == wy1) {