/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can
* be found in the LICENSE file.
*
*/
#include "transform_stack.h"
//
//
//
#include <stdlib.h>
#include <math.h>
//
//
//
#undef NDEBUG
#include <assert.h>
//
//
//
#define TS_TRANSFORM_SUFFIX_EVAL(a) a
#define TS_TRANSFORM_SUFFIX_CONCAT(func) \
TS_TRANSFORM_SUFFIX_EVAL(func)##TS_TRANSFORM_SUFFIX_EVAL(TS_TRANSFORM_FLOAT_SUFFIX)
//
//
//
#define TS_TRANSFORM_SIN(x) TS_TRANSFORM_SUFFIX_CONCAT(sin)(x)
#define TS_TRANSFORM_COS(x) TS_TRANSFORM_SUFFIX_CONCAT(cos)(x)
#define TS_TRANSFORM_TAN(x) TS_TRANSFORM_SUFFIX_CONCAT(tan)(x)
//
//
//
#define TS_TRANSFORM_ZERO ((ts_transform_float_t)0.0)
#define TS_TRANSFORM_ONE ((ts_transform_float_t)1.0)
#define TS_TRANSFORM_RCP(f) (TS_TRANSFORM_ONE / (f))
//
//
//
union ts_transform_stack_3x3_u
{
ts_transform_float_t a8[8];
struct {
ts_transform_float_t sx;
ts_transform_float_t shx;
ts_transform_float_t tx;
ts_transform_float_t shy;
ts_transform_float_t sy;
ts_transform_float_t ty;
ts_transform_float_t w0;
ts_transform_float_t w1;
// w2 is always 1.0
};
struct {
ts_transform_float_t a;
ts_transform_float_t b;
ts_transform_float_t c;
ts_transform_float_t d;
ts_transform_float_t e;
ts_transform_float_t f;
ts_transform_float_t g;
ts_transform_float_t h;
// i is always 1.0
};
};
//
//
//
struct ts_transform_stack
{
uint32_t size;
uint32_t count;
ts_transform_weakref_t * weakrefs;
union ts_transform_stack_3x3_u * transforms;
};
//
//
//
static
void
ts_transform_stack_resize(struct ts_transform_stack * const ts, uint32_t const size)
{
ts->size = size;
ts->weakrefs = realloc(ts->weakrefs, size * sizeof(*ts->weakrefs));
ts->transforms = realloc(ts->transforms,size * sizeof(*ts->transforms));
}
static
void
ts_transform_stack_ensure(struct ts_transform_stack * const ts)
{
if (ts->count < ts->size)
return;
// increase by 50% and by at least 8
ts_transform_stack_resize(ts,ts->size + max(ts->size/2,8));
}
//
//
//
struct ts_transform_stack *
ts_transform_stack_create(uint32_t const size)
{
struct ts_transform_stack * ts = malloc(sizeof(*ts));
ts->size = size;
ts->count = 0;
ts->transforms = NULL;
ts->weakrefs = NULL;
ts_transform_stack_resize(ts,size);
return ts;
}
void
ts_transform_stack_release(struct ts_transform_stack * const ts)
{
free(ts->transforms);
free(ts->weakrefs);
free(ts);
}
//
//
//
uint32_t
ts_transform_stack_save(struct ts_transform_stack * const ts)
{
return ts->count;
}
void
ts_transform_stack_restore(struct ts_transform_stack * const ts,
uint32_t const restore)
{
ts->count = restore;
}
//
//
//
static
union ts_transform_stack_3x3_u *
ts_transform_stack_tos(struct ts_transform_stack * const ts)
{
return ts->transforms + ts->count - 1;
}
//
//
//
static
void
ts_transform_stack_3x3_u_copy(union ts_transform_stack_3x3_u * const __restrict dst,
union ts_transform_stack_3x3_u const * const __restrict src)
{
*dst = *src;
}
//
// C = A * B
//
// FIXME -- can save affine vs. projective flags and save a few ops
//
#define TS_TRANSFORM_MULTIPLY(A,B) \
A->sx * B->sx + A->shx * B->shy + A->tx * B->w0, \
A->sx * B->shx + A->shx * B->sy + A->tx * B->w1, \
A->sx * B->tx + A->shx * B->ty + A->tx, \
A->shy * B->sx + A->sy * B->shy + A->ty * B->w0, \
A->shy * B->shx + A->sy * B->sy + A->ty * B->w1, \
A->shy * B->tx + A->sy * B->ty + A->ty, \
A->w0 * B->sx + A->w1 * B->shy + B->w0, \
A->w0 * B->shx + A->w1 * B->sy + B->w1, \
A->w0 * B->tx + A->w1 * B->ty + TS_TRANSFORM_ONE
//
//
//
#define TS_IS_AFFINE(t) ((t->w0 == TS_TRANSFORM_ZERO) && (t->w1 == TS_TRANSFORM_ZERO))
static
ts_transform_type_e
ts_transform_stack_classify(struct ts_transform_stack * const ts)
{
union ts_transform_stack_3x3_u const * const t = ts_transform_stack_tos(ts);
if (TS_IS_AFFINE(t))
return TS_TRANSFORM_TYPE_AFFINE;
else
return TS_TRANSFORM_TYPE_PROJECTIVE;
}
//
//
//
ts_transform_float_t *
ts_transform_stack_top_transform(struct ts_transform_stack * const ts)
{
return ts_transform_stack_tos(ts)->a8;
}
ts_transform_weakref_t *
ts_transform_stack_top_weakref(struct ts_transform_stack * const ts)
{
return ts->weakrefs + ts->count - 1;
}
//
//
//
void
ts_transform_stack_dup(struct ts_transform_stack * const ts)
{
ts_transform_stack_ensure(ts);
union ts_transform_stack_3x3_u * const tos = ts_transform_stack_tos(ts);
ts_transform_stack_3x3_u_copy(tos+1,tos);
ts->weakrefs[ts->count] = ts->weakrefs[ts->count-1];
ts->count += 1;
}
void
ts_transform_stack_drop(struct ts_transform_stack * const ts)
{
assert(ts->count >= 1);
ts->count -= 1;
}
//
//
//
static
void
ts_transform_stack_swap_drop(struct ts_transform_stack * const ts)
{
assert(ts->count >= 2);
union ts_transform_stack_3x3_u * const tos = ts_transform_stack_tos(ts);
ts_transform_stack_3x3_u_copy(tos-1,tos);
ts->weakrefs[ts->count-2] = ts->weakrefs[ts->count-1];
ts->count -= 1;
}
//
//
//
static
void
ts_transform_stack_store_matrix_8(struct ts_transform_stack * const ts,
uint32_t const idx,
ts_transform_float_t const sx,
ts_transform_float_t const shx,
ts_transform_float_t const tx,
ts_transform_float_t const shy,
ts_transform_float_t const sy,
ts_transform_float_t const ty,
ts_transform_float_t const w0,
ts_transform_float_t const w1)
{
union ts_transform_stack_3x3_u * t = ts->transforms + idx;
t->sx = sx;
t->shx = shx;
t->tx = tx;
t->shy = shy;
t->sy = sy;
t->ty = ty;
t->w0 = w0;
t->w1 = w1;
ts->weakrefs[idx] = TS_TRANSFORM_WEAKREF_INVALID;
}
//
//
//
static
void
ts_transform_stack_store_matrix(struct ts_transform_stack * const ts,
uint32_t const idx,
ts_transform_float_t const sx,
ts_transform_float_t const shx,
ts_transform_float_t const tx,
ts_transform_float_t const shy,
ts_transform_float_t const sy,
ts_transform_float_t const ty,
ts_transform_float_t const w0,
ts_transform_float_t const w1,
ts_transform_float_t const w2)
{
if (w2 == TS_TRANSFORM_ONE)
{
ts_transform_stack_store_matrix_8(ts,idx,
sx, shx,tx,
shy,sy, ty,
w0, w1);
}
else
{
// normalize
ts_transform_float_t d = TS_TRANSFORM_RCP(w2);
ts_transform_stack_store_matrix_8(ts,idx,
sx * d, shx * d, tx * d,
shy * d, sy * d, ty * d,
w0 * d, w1 * d);
}
}
//
//
//
static
void
ts_transform_stack_push_matrix_8(struct ts_transform_stack * const ts,
ts_transform_float_t const sx,
ts_transform_float_t const shx,
ts_transform_float_t const tx,
ts_transform_float_t const shy,
ts_transform_float_t const sy,
ts_transform_float_t const ty,
ts_transform_float_t const w0,
ts_transform_float_t const w1)
{
ts_transform_stack_ensure(ts);
ts_transform_stack_store_matrix_8(ts,ts->count++,
sx, shx,tx,
shy,sy, ty,
w0, w1);
}
//
//
//
void
ts_transform_stack_push_matrix(struct ts_transform_stack * const ts,
ts_transform_float_t const sx,
ts_transform_float_t const shx,
ts_transform_float_t const tx,
ts_transform_float_t const shy,
ts_transform_float_t const sy,
ts_transform_float_t const ty,
ts_transform_float_t const w0,
ts_transform_float_t const w1,
ts_transform_float_t const w2)
{
if (w2 == TS_TRANSFORM_ONE)
{
ts_transform_stack_push_matrix_8(ts,
sx, shx,tx,
shy,sy, ty,
w0, w1);
}
else
{
// normalize
ts_transform_float_t d = TS_TRANSFORM_RCP(w2);
ts_transform_stack_push_matrix_8(ts,
sx * d, shx * d, tx * d,
shy * d, sy * d, ty * d,
w0 * d, w1 * d);
}
}
//
//
//
void
ts_transform_stack_push_identity(struct ts_transform_stack * const ts)
{
ts_transform_stack_push_matrix_8(ts,
1.0, 0.0, 0.0,
0.0, 1.0, 0.0,
0.0, 0.0);
}
void
ts_transform_stack_push_affine(struct ts_transform_stack * const ts,
ts_transform_float_t const sx,
ts_transform_float_t const shx,
ts_transform_float_t const tx,
ts_transform_float_t const shy,
ts_transform_float_t const sy,
ts_transform_float_t const ty)
{
ts_transform_stack_push_matrix_8(ts,
sx, shx, tx,
shy, sy, ty,
0.0, 0.0);
}
void
ts_transform_stack_push_translate(struct ts_transform_stack * const ts,
ts_transform_float_t const tx,
ts_transform_float_t const ty)
{
ts_transform_stack_push_matrix_8(ts,
1.0, 0.0, tx,
0.0, 1.0, ty,
0.0, 0.0);
}
void
ts_transform_stack_push_scale(struct ts_transform_stack * const ts,
ts_transform_float_t const sx,
ts_transform_float_t const sy)
{
ts_transform_stack_push_matrix_8(ts,
sx, 0.0, 0.0,
0.0, sy, 0.0,
0.0, 0.0);
}
void
ts_transform_stack_push_shear(struct ts_transform_stack * const ts,
ts_transform_float_t const shx,
ts_transform_float_t const shy)
{
ts_transform_stack_push_matrix_8(ts,
1.0, shx, 0.0,
shy, 1.0, 0.0,
0.0, 0.0);
}
void
ts_transform_stack_push_skew_x(struct ts_transform_stack * const ts,
ts_transform_float_t const theta)
{
ts_transform_float_t const tan_theta = TS_TRANSFORM_TAN(theta); // replace with tanpi if available
ts_transform_stack_push_matrix_8(ts,
1.0, tan_theta,0.0,
0.0, 1.0, 0.0,
0.0, 0.0);
}
void
ts_transform_stack_push_skew_y(struct ts_transform_stack * const ts,
ts_transform_float_t const theta)
{
ts_transform_float_t const tan_theta = TS_TRANSFORM_TAN(theta); // replace with tanpi if available
ts_transform_stack_push_matrix_8(ts,
1.0, 0.0, 0.0,
tan_theta, 1.0, 0.0,
0.0, 0.0);
}
void
ts_transform_stack_push_rotate(struct ts_transform_stack * const ts,
ts_transform_float_t const theta)
{
ts_transform_float_t const cos_theta = TS_TRANSFORM_COS(theta); // replace with cospi if available
ts_transform_float_t const sin_theta = TS_TRANSFORM_SIN(theta); // replace with sinpi if available
ts_transform_stack_push_matrix_8(ts,
cos_theta,-sin_theta, 0.0,
sin_theta, cos_theta, 0.0,
0.0, 0.0);
}
void
ts_transform_stack_push_rotate_xy2(struct ts_transform_stack * const ts,
ts_transform_float_t const theta,
ts_transform_float_t const cx,
ts_transform_float_t const cy,
ts_transform_float_t const tx,
ts_transform_float_t const ty)
{
ts_transform_float_t const cos_theta = TS_TRANSFORM_COS(theta); // replace with cospi if available
ts_transform_float_t const sin_theta = TS_TRANSFORM_SIN(theta); // replace with sinpi if available
ts_transform_stack_push_matrix_8(ts,
cos_theta,-sin_theta, tx - (cx * cos_theta) + (cy * sin_theta),
sin_theta, cos_theta, ty - (cx * sin_theta) - (cy * cos_theta),
0.0, 0.0);
}
void
ts_transform_stack_push_rotate_xy(struct ts_transform_stack * const ts,
ts_transform_float_t const theta,
ts_transform_float_t const cx,
ts_transform_float_t const cy)
{
ts_transform_stack_push_rotate_xy2(ts,theta,cx,cy,cx,cy);
}
void
ts_transform_stack_push_rotate_scale_xy(struct ts_transform_stack * const ts,
ts_transform_float_t const theta,
ts_transform_float_t const sx,
ts_transform_float_t const sy,
ts_transform_float_t const cx,
ts_transform_float_t const cy)
{
ts_transform_float_t const cos_theta = TS_TRANSFORM_COS(theta); // replace with cospi if available
ts_transform_float_t const sin_theta = TS_TRANSFORM_SIN(theta); // replace with sinpi if available
ts_transform_stack_push_matrix_8(ts,
sx*cos_theta,-sx*sin_theta, cx - cx*sx*cos_theta + cy*sy*sin_theta,
sy*sin_theta, sy*cos_theta, cy - cy*sy*cos_theta - cx*sx*sin_theta,
0.0, 0.0);
}
//
// See: "Fundamentals of Texture Mapping and Image Warping" by Paul S. Heckbert (1989)
//
#define DET(a,b,c,d) (a * d - b * c)
#define X(v,i) v[i*2]
#define Y(v,i) v[i*2+1]
//
//
//
ts_transform_type_e
ts_transform_stack_adjoint(struct ts_transform_stack * const ts)
{
union ts_transform_stack_3x3_u * const t = ts_transform_stack_tos(ts);
#if 0
// save for determinant
ts_transform_float_t const a = t->a;
ts_transform_float_t const b = t->b;
ts_transform_float_t const c = t->c;
#endif
ts_transform_stack_store_matrix(ts,ts->count-1,
+DET(t->e, t->f, t->h, TS_TRANSFORM_ONE),
-DET(t->b, t->c, t->h, TS_TRANSFORM_ONE),
+DET(t->b, t->c, t->e, t->f),
-DET(t->d, t->f, t->g, TS_TRANSFORM_ONE),
+DET(t->a, t->c, t->g, TS_TRANSFORM_ONE),
-DET(t->a, t->c, t->d, t->f),
+DET(t->d, t->e, t->g, t->h),
-DET(t->a, t->b, t->g, t->h),
+DET(t->a, t->b, t->d, t->e));
#if 0
// determinant of t
ts_transform_float_t const det = a * t->a + b * t->d + c * t->g;
#endif
return ts_transform_stack_classify(ts);
}
//
//
//
ts_transform_type_e
ts_transform_stack_push_unit_to_quad(struct ts_transform_stack * const ts,
ts_transform_float_t const quad[8])
{
ts_transform_float_t const x0 = X(quad,0);
ts_transform_float_t const y0 = Y(quad,0);
ts_transform_float_t const x1 = X(quad,1);
ts_transform_float_t const y1 = Y(quad,1);
ts_transform_float_t const x2 = X(quad,2);
ts_transform_float_t const y2 = Y(quad,2);
ts_transform_float_t const x3 = X(quad,3);
ts_transform_float_t const y3 = Y(quad,3);
ts_transform_float_t sx = x1 - x0;
ts_transform_float_t shy = y1 - y0;
ts_transform_float_t const dx2 = x3 - x2;
ts_transform_float_t const dy2 = y3 - y2;
ts_transform_float_t const dx3 = -sx - dx2;
ts_transform_float_t const dy3 = -shy - dy2;
// if both zero then quad_dst is a parallelogram and affine
if ((dx3 == TS_TRANSFORM_ZERO) && (dy3 == TS_TRANSFORM_ZERO))
{
ts_transform_float_t const shx = x2 - x1;
ts_transform_float_t const sy = y2 - y1;
ts_transform_stack_push_matrix_8(ts,
sx, shx, x0,
shy, sy, y0,
0.0, 0.0);
return TS_TRANSFORM_TYPE_AFFINE;
}
else
{
ts_transform_float_t const dx1 = x1 - x2;
ts_transform_float_t const dy1 = y1 - y2;
ts_transform_float_t const wx_den = dx1 * dy2 - dx2 * dy1;
if (wx_den == TS_TRANSFORM_ZERO)
return TS_TRANSFORM_TYPE_INVALID;
ts_transform_float_t const w0_num = dx3 * dy2 - dx2 * dy3;
ts_transform_float_t const w1_num = dx1 * dy3 - dx3 * dy1;
ts_transform_float_t const w0 = w0_num / wx_den;
ts_transform_float_t const w1 = w1_num / wx_den;
sx += w0 * x1;
ts_transform_float_t const shx = x3 - x0 + w1 * x3;
shy += w0 * y1;
ts_transform_float_t const sy = y3 - y0 + w1 * y3;
ts_transform_stack_push_matrix_8(ts,
sx, shx, x0,
shy, sy, y0,
w0, w1);
return TS_TRANSFORM_TYPE_PROJECTIVE;
}
}
//
//
//
ts_transform_type_e
ts_transform_stack_push_quad_to_unit(struct ts_transform_stack * const ts,
float const quad[8])
{
if (ts_transform_stack_push_unit_to_quad(ts,quad) == TS_TRANSFORM_TYPE_INVALID)
return TS_TRANSFORM_TYPE_INVALID;
return ts_transform_stack_adjoint(ts);
}
//
//
//
ts_transform_type_e
ts_transform_stack_push_quad_to_quad(struct ts_transform_stack * const ts,
ts_transform_float_t const quad_src[8],
ts_transform_float_t const quad_dst[8])
{
if (ts_transform_stack_push_unit_to_quad(ts,quad_dst) == TS_TRANSFORM_TYPE_INVALID)
return TS_TRANSFORM_TYPE_INVALID;
if (ts_transform_stack_push_quad_to_unit(ts,quad_src) == TS_TRANSFORM_TYPE_INVALID)
return TS_TRANSFORM_TYPE_INVALID;
ts_transform_stack_multiply(ts);
return ts_transform_stack_classify(ts);
}
//
//
//
ts_transform_type_e
ts_transform_stack_push_rect_to_quad(struct ts_transform_stack * const ts,
ts_transform_float_t const x0,
ts_transform_float_t const y0,
ts_transform_float_t const x1,
ts_transform_float_t const y1,
ts_transform_float_t const quad_dst[8])
{
if (ts_transform_stack_push_unit_to_quad(ts,quad_dst) == TS_TRANSFORM_TYPE_INVALID)
return TS_TRANSFORM_TYPE_INVALID;
ts_transform_stack_push_matrix_8(ts,
TS_TRANSFORM_RCP(x1-x0),
0.0,
-x0,
0.0,
TS_TRANSFORM_RCP(y1-y0),
-y0,
0.0,
0.0);
ts_transform_stack_multiply(ts);
return ts_transform_stack_classify(ts);
}
//
// The second matrix on the stack (TOS[-1]) is post-multiplied by the
// top matrix on the stack (TOS[0]).
//
// The result replaces TOS[0] and TOS[-1] is unmodified.
//
// The stack effect of concat is:
//
// | B | | A*B |
// | A | | A |
// | . | => | . |
// | . | | . |
// | . | | . |
//
void
ts_transform_stack_concat(struct ts_transform_stack * const ts)
{
assert(ts->count >= 2);
// get A and B
union ts_transform_stack_3x3_u const * const B = ts_transform_stack_tos(ts);
union ts_transform_stack_3x3_u const * const A = B - 1;
ts_transform_stack_store_matrix(ts,ts->count-1,TS_TRANSFORM_MULTIPLY(A,B));
}
//
// The second matrix on the stack (TOS[-1]) is post-multiplied by the
// top matrix on the stack (TOS[0]).
//
// The result replaces both matrices.
//
// The stack effect of multiply is:
//
// | B | | A*B |
// | A | | . |
// | . | => | . |
// | . | | . |
// | . | | . |
//
void
ts_transform_stack_multiply(struct ts_transform_stack * const ts)
{
assert(ts->count >= 2);
// get A and B
union ts_transform_stack_3x3_u const * const B = ts_transform_stack_tos(ts);
union ts_transform_stack_3x3_u const * const A = B - 1;
ts_transform_stack_store_matrix(ts,ts->count-- - 2,TS_TRANSFORM_MULTIPLY(A,B));
}
//
//
//
void
ts_transform_stack_transform_xy(struct ts_transform_stack * const ts,
ts_transform_float_t const x,
ts_transform_float_t const y,
ts_transform_float_t * const xp,
ts_transform_float_t * const yp)
{
union ts_transform_stack_3x3_u const * const t = ts_transform_stack_tos(ts);
*xp = x * t->sx + y * t->shx + t->tx;
*yp = x * t->shy + y * t->sy + t->ty;
if (!TS_IS_AFFINE(t))
{
ts_transform_float_t const d = TS_TRANSFORM_RCP(x * t->w0 + y * t->w1 + TS_TRANSFORM_ONE);
*xp *= d;
*yp *= d;
}
}
//
// test it!
//
#ifdef TS_DEBUG
#include <stdio.h>
#define TS_DEBUG_SCALE 32.0
//
//
//
void
ts_transform_stack_tos_debug(struct ts_transform_stack * const ts)
{
union ts_transform_stack_3x3_u const * const t = ts_transform_stack_tos(ts);
printf("{ { %13.5f, %13.5f, %13.5f },\n"
" { %13.5f, %13.5f, %13.5f },\n"
" { %13.5f, %13.5f, %13.5f } }\n",
t->a8[0],
t->a8[1],
t->a8[2],
t->a8[3],
t->a8[4],
t->a8[5],
t->a8[6],
t->a8[7],
TS_TRANSFORM_ONE);
}
//
//
//
void
ts_debug(struct ts_transform_stack * const ts,
ts_transform_float_t const quad[8])
{
ts_transform_stack_tos_debug(ts);
for (int ii=0; ii<8; ii+=2)
{
ts_transform_float_t xp,yp;
ts_transform_stack_transform_xy(ts,
quad[ii],quad[ii+1],
&xp,&yp);
printf("( %13.2f, %13.2f ) \t-> ( %13.2f, %13.2f )\n",
xp,yp,xp/TS_DEBUG_SCALE,yp/TS_DEBUG_SCALE);
}
}
//
//
//
int
main(int argc, char * argv[])
{
struct ts_transform_stack * const ts = ts_transform_stack_create(32);
ts_transform_float_t const w = 1000;
ts_transform_float_t const h = 1000;
#if 1
ts_transform_stack_push_scale(ts,TS_DEBUG_SCALE,TS_DEBUG_SCALE);
// OpenGL'ism
ts_transform_stack_push_affine(ts,
1.0f, 0.0f,0.0f,
0.0f,-1.0f,h);
// multiply
ts_transform_stack_concat(ts);
#else
ts_transform_stack_push_identity(ts);
#endif
uint32_t const restore = ts_transform_stack_save(ts);
//
//
//
ts_transform_float_t const quad_src[8] = { 0.0f,0.0f,
w, 0.0f,
w, h,
0.0f,h };
ts_transform_float_t const quad_dst[8] = { 300.0f, 0.0f,
w-300.0f, 0.0f,
w, h,
0.0f, h };
ts_transform_float_t const quad_tst[8] = { 50, 50,
1550, 50,
1550, 1550,
50, 1550 };
//
// RECT TO QUAD
//
printf("type = %d\n",
ts_transform_stack_push_rect_to_quad(ts,
0.0, 0.0,
w, h,
quad_dst));
ts_transform_stack_concat(ts);
ts_debug(ts,quad_src);
//
// QUAD TO QUAD
//
ts_transform_stack_restore(ts,restore);
printf("type = %d\n",
ts_transform_stack_push_quad_to_quad(ts,
quad_src,
quad_dst));
ts_transform_stack_concat(ts);
ts_debug(ts,quad_src);
//
// DIRECT
//
ts_transform_stack_restore(ts,restore);
ts_transform_stack_push_matrix(ts,
0.87004626f, -0.35519487f, 72.14745f,
0.0f, 0.2600208f, 86.16314f,
0.0f, -0.0029599573f, 1.0f);
ts_transform_stack_concat(ts);
ts_transform_float_t const quad_foo[8] = { -10, 10,
130, 10,
130, 110,
-10, 110 };
ts_debug(ts,quad_foo);
return EXIT_SUCCESS;
}
#endif
//
//
//