diff options
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/pig.c | 20 | ||||
| -rw-r--r-- | src/pig.h | 1 | ||||
| -rw-r--r-- | src/sad-node.c | 123 | ||||
| -rw-r--r-- | src/sad-node.h | 27 |
5 files changed, 171 insertions, 2 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 168d4d1..0088044 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -14,6 +14,8 @@ pig_SOURCES = \ macros.h \ main.c \ m4f.h \ + sad-node.c \ + sad-node.h \ shader.c \ shader.h \ shader-node.c \ @@ -27,6 +27,7 @@ #include "m4f.h" #include "macros.h" #include "pig.h" +#include "sad-node.h" #include "shader-node.h" #include "shader.h" @@ -63,8 +64,12 @@ static void pig_uniforms_func(shader_t *shader, void *uniforms_ctxt, void *rende unsigned t0, t1; float r = randf(); - if (play_ticks_elapsed(play, PLAY_TICKS_TIMER2, 1000)) - shader_reload_files(shader); + if (play_ticks_elapsed(play, PLAY_TICKS_TIMER2, 1000)) { + if (shader_reload_files(shader) < 0) + stage_set_active(pig->sadface, 1); + else + stage_set_active(pig->sadface, 0); + } /* this one just keeps increasing */ t0 = play_ticks(play, PLAY_TICKS_TIMER0); @@ -212,6 +217,17 @@ static void * pig_init(play_t *play, int argc, char *argv[], unsigned flags) &pig->color ); + pig->sadface = sad_node_new(&(stage_conf_t){ + .parent = pig->stage, + .name = "sadface", + .layer = 3, + .active = 0, + .alpha = 1.f, + }, + &pig->transform, + &pig->color + ); + (void) shader_node_new_files(&(stage_conf_t){ .parent = pig->stage, .name = "shader", @@ -28,6 +28,7 @@ typedef struct pig_t { SDL_Window *window; SDL_GLContext *gl; stage_t *stage; + stage_t *sadface; unsigned window_width, window_height; unsigned windowed:1; m4f_t transform; diff --git a/src/sad-node.c b/src/sad-node.c new file mode 100644 index 0000000..6ec7a6c --- /dev/null +++ b/src/sad-node.c @@ -0,0 +1,123 @@ +/* + * Copyright (C) 2018-2020 - Vito Caputo - <vcaputo@pengaru.com> + * + * This program is free software: you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 3 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <SDL.h> + +#include <stage.h> + +#include "glad.h" +#include "m4f.h" +#include "sad-node.h" +#include "shader-node.h" +#include "v3f.h" + + +static const char *sad_vs = "" + "#version 120\n" + + "uniform mat4 model_x;" + + "attribute vec3 i_vertex;" + "attribute vec2 i_texcoord;" + + "void main()" + "{" + " gl_TexCoord[0].xy = i_texcoord;" + " gl_Position = model_x * vec4(i_vertex, 1.f);" + "}" +""; + + +static const char *sad_fs = "" + "#version 120\n" + + "uniform float alpha;" + "uniform float time;" + "uniform float T;" + "uniform vec3 color;" + "uniform float seed; " + "uniform float rand;" + + "const vec2 leye = vec2(-.5f, .5f);" + "const vec2 reye = vec2(.5f, .5f);" + "const vec2 frown = vec2(0.f, -1.2f);" + "const float eye_radius = .2f;" + "const float frown_radius = 1.f;" + "const float lip_thickness = .1f;" + + "void eye(in vec2 center, inout vec4 c)" + "{" + " float r = length(center - gl_TexCoord[0].st);" + + " if (r <= eye_radius) {" + " float v = (1.f / eye_radius) * r;" + + " v = 1.f - pow(v, 20);" + " c = vec4(color * v, v);" + " }" + "}" + + "void arc(vec2 center, inout vec4 c)" + "{" + " float r = length(center - gl_TexCoord[0].st);" + + " if (r >= frown_radius - lip_thickness &&" + " r <= frown_radius + lip_thickness) {" + " float v = cos((r - (frown_radius + lip_thickness)) * 1.f / (lip_thickness * 2.f) * 6.28) * .5f + .5f;" + + " v = 1.f - pow(v, 20);" + " c = vec4(color * v, v);" + " }" + "}" + + "void main()" + "{" + " float r = length(gl_TexCoord[0].st);" + " vec4 c = vec4(0.f, 0.f, 0.f, 0.f);" + + " eye(leye, c);" + " eye(reye, c);" + " arc(frown, c);" + + " gl_FragColor = c;" + "}" +""; + + +static void sad_uniforms(shader_t *shader, void *uniforms_ctxt, void *render_ctxt, unsigned n_uniforms, const int *uniforms, const m4f_t *model_x, float alpha) +{ + v3f_t *color = uniforms_ctxt; + + glUniform1f(uniforms[0], alpha); + glUniformMatrix4fv(uniforms[1], 1, GL_FALSE, &model_x->m[0][0]); + glUniform3f(uniforms[2], color->x, color->y, color->z); +} + + +/* create sad face rendering stage */ +stage_t * sad_node_new(const stage_conf_t *conf, const m4f_t *model_x, const v3f_t *color) +{ + assert(model_x); + assert(color); + + return shader_node_new_src(conf, sad_vs, sad_fs, model_x, sad_uniforms, (void *)color, 3, + (const char *[]){ + "alpha", + "model_x", + "color", + } + ); +} diff --git a/src/sad-node.h b/src/sad-node.h new file mode 100644 index 0000000..8bbfd9c --- /dev/null +++ b/src/sad-node.h @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2018-2020 - Vito Caputo - <vcaputo@pengaru.com> + * + * This program is free software: you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 3 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _SAD_NODE_H +#define _SAD_NODE_H + +typedef struct stage_t stage_t; +typedef struct stage_conf_t stage_conf_t; +typedef struct m4f_t m4f_t; +typedef struct v3f_t v3f_t; + +stage_t * sad_node_new(const stage_conf_t *conf, const m4f_t *model_x, const v3f_t *color); + +#endif |