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smol_snake3d_test.c
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#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#ifndef __EMSCRIPTEN__
#define SMOL_GL_DEFENITION_HEADER "thirdparty/glbind.h"
#ifndef _MSC_VER
#define GLBIND_IMPLEMENTATION
#endif
#include SMOL_GL_DEFENITION_HEADER
#else
#include <emscripten.h>
#include <GL/gl.h>
#include <GL/glext.h>
#include <GLES2/gl2.h>
#include <GLES3/gl3.h>
#include <GLES3/gl2ext.h>
#include <GLES3/gl32.h>
#endif
#define SMOL_FRAME_IMPLEMENTATION
#include "smol_frame.h"
#define SMOL_MATH_IMPLEMENTATION
#include "smol_math.h"
#define SMOL_UTILS_IMPLEMENTATION
#include "smol_utils.h"
#define SMOL_INPUT_IMPLEMENTATION
#include "smol_input.h"
#define SMOL_TEXT_RENDERER_IMPLEMENTATION
#include "smol_text_renderer.h"
#include "smol_font_16x16.h"
#include "smol_font_7x8.h"
#define CASE_STRING( case_enum ) case case_enum: return #case_enum
#define smol_offset_of(Type, Field) ((void*)&(((Type*)0)->Field))
#define smol_array_size(array) (sizeof(array)/sizeof(array[0]))
#define RGBA(r, g, b, a) ( \
(r << 0x00) | \
(g << 0x08) | \
(b << 0x10) | \
(a << 0x18) \
)
typedef struct {
smol_v3_t pos;
smol_v4_t col;
} pos_col_t;
typedef struct {
unsigned int a, b, c;
} tri_idx_t;
typedef union {
struct {
int x;
int y;
int z;
};
int loc[3];
int plane;
} snek_cell_t;
typedef struct {
smol_v4_t pos_scale;
smol_v4_t color;
} cube_inst_t;
typedef struct _smol_frame_counter_t {
int counter;
int fps;
double spf;
double delta_accum;
} smol_frame_counter_t;
typedef struct {
char prev_face;
char scalar;
} dir_scalar_t;
typedef struct {
char hor_neighbors[2];
char ver_neighbors[2];
char vec_idx[2];
char positive_per_axis_dir[2];
dir_scalar_t adj_access_axis[6];
} face_data_t;
typedef struct {
float split_percentage;
char is_vertical;
union {
char is_bottom;
char is_right;
};
} vp_spec_t;
typedef struct {
int left;
int top;
int right;
int bottom;
vp_spec_t spec;
} viewport_t;
typedef struct {
int left;
int top;
int right;
int bottom;
int num_viewports;
viewport_t* viewports;
} view_partition_t;
typedef union {
struct { int x, y, z; };
int c[3];
} iv3;
//TODO: AI(?), Networking, Main menu, Sounds
typedef struct {
snek_cell_t* cells;
int len;
iv3 heading;
iv3 direction;
smol_v4_t color;
char plane;
float move_step;
float next_step;
char player_type;
union {
struct {
int key_up;
int key_down;
int key_left;
int key_right;
};
};
} snek_t;
#define SNAKE_PLAYER_PHYSICAL 0
#define SNAKE_PLAYER_ONLINE 1
#define SNAKE_PLAYER_BOT 2
void update_view_partition(view_partition_t* partition, int left, int top, int right, int bottom) {
partition->left = left;
partition->top = top;
partition->right = right;
partition->bottom = bottom;
for(int i = 0; i < partition->num_viewports; i++) {
vp_spec_t spec = partition->viewports[i].spec;
if(spec.is_vertical) {
if(spec.is_bottom) {
partition->viewports[i].top = bottom - (float)(bottom - top) * spec.split_percentage;
partition->viewports[i].bottom = bottom;
bottom = partition->viewports[i].top;
} else {
partition->viewports[i].top = top;
partition->viewports[i].bottom = top + (float)(bottom - top) * spec.split_percentage;
top = partition->viewports[i].bottom;
}
partition->viewports[i].left = left;
partition->viewports[i].right = right;
}
else {
if(spec.is_right) {
partition->viewports[i].left = right - (float)(right - left) * spec.split_percentage;
partition->viewports[i].right = right;
right = partition->viewports[i].left;
} else {
partition->viewports[i].left = left;
partition->viewports[i].right = left + (float)(right - left) * spec.split_percentage;
left = partition->viewports[i].right;
}
partition->viewports[i].top = top;
partition->viewports[i].bottom = bottom;
}
}
}
view_partition_t create_viewport_partition(int left, int top, int right, int bottom, vp_spec_t* specs, int num_specs) {
view_partition_t partition = { 0 };
partition.num_viewports = num_specs;
partition.viewports = malloc(sizeof(viewport_t) * num_specs);
for(int i = 0; i < num_specs; i++) {
partition.viewports[i].spec = specs[i];
}
update_view_partition(&partition, left, top, right, bottom);
return partition;
}
#define VIEWPORT_BIT 2
#define SCISSOR_BIT 1
void activate_viewport(view_partition_t* partition, int index, int flags) {
SMOL_ASSERT(index < partition->num_viewports);
viewport_t viewport = partition->viewports[index];
int x = viewport.left;
int y = partition->bottom - (viewport.top + (viewport.bottom - viewport.top));
int w = viewport.right - viewport.left;
int h = viewport.bottom - viewport.top;
if(flags & VIEWPORT_BIT)
glViewport(x, y, w, h);
if(flags & SCISSOR_BIT) {
glEnable(GL_SCISSOR_TEST);
glScissor(x, y, w, h);
}
}
void get_viewport_origin(view_partition_t* partition, int index, int* x, int* y) {
SMOL_ASSERT(index < partition->num_viewports);
*x = partition->viewports[index].left;
*y = partition->viewports[index].top;
}
void get_viewport_size(view_partition_t* partition, int index, int* w, int* h) {
SMOL_ASSERT(index < partition->num_viewports);
*w = partition->viewports[index].right - partition->viewports[index].left;
*h = partition->viewports[index].bottom - partition->viewports[index].top;
}
void get_viewport_position_size(view_partition_t* partition, int index, int* x, int* y, int* w, int* h) {
SMOL_ASSERT(index < partition->num_viewports);
*x = partition->viewports[index].left;
*y = partition->viewports[index].top;
*w = partition->viewports[index].right - partition->viewports[index].left;
*h = partition->viewports[index].bottom - partition->viewports[index].top;
}
void get_viewport_aspect_ratio(view_partition_t* partition, int index, float* aspect_ratio) {
SMOL_ASSERT(index < partition->num_viewports);
int w, h;
get_viewport_size(partition, index, &w, &h);
*aspect_ratio = (float)w / (float)h;
}
int smol_frame_counter_fps(smol_frame_counter_t* ctr);
void smol_frame_counter_update(smol_frame_counter_t* ctr, double dt);
#define MAX_NUM_CUBES 10000
#define ARENA_SIDE 17
#define ARENA_PLANE_LEFT 0
#define ARENA_PLANE_BOTTOM 1
#define ARENA_PLANE_FRONT 2
#define ARENA_PLANE_RIGHT 3
#define ARENA_PLANE_TOP 4
#define ARENA_PLANE_BACK 5
#define INVALID_AXIS -1
#define X_AXIS 0
#define Y_AXIS 1
#define Z_AXIS 2
GLuint create_and_compile_shader(const char* code, GLenum shader_type, const char* file_name);
GLuint create_and_compile_shader_from_file(const char* file_path, GLenum shader_type);
GLuint create_shader_program(GLuint* shaders, GLuint count);
const char* debug_message_severity_str(GLenum severity) {
switch(severity) {
CASE_STRING(GL_DEBUG_SEVERITY_LOW_ARB);
CASE_STRING(GL_DEBUG_SEVERITY_MEDIUM_ARB);
CASE_STRING(GL_DEBUG_SEVERITY_HIGH_ARB);
}
return "Not part of gl debug severity.";
}
void APIENTRY debug_message_callback(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,const void *userParam) {
puts(debug_message_severity_str(severity));
puts(message);
SMOL_BREAKPOINT();
}
#define SPEED_FORMULA(n) (0.3 - fmin(pow((snake[n].len - 3) / 100., 1.25), 1.0)*0.275)
const char* plane_names[] = {
"Top",
"Right",
"Back",
"Bottom",
"Left",
"Front"
};
int main(const int argc, const char* argv[]) {
smol_randomize(1337);
printf("%s\n", argv[0]);
int is_compatibility_profile = SMOL_FALSE;
smol_frame_counter_t counter = { 0 };
#ifndef __EMSCRIPTEN__
GLenum result = glbInit(NULL, NULL);
smol_frame_gl_spec_t gl_spec = smol_init_gl_spec(3, 3, SMOL_FALSE, SMOL_FALSE, 16, SMOL_TRUE);
#else
smol_frame_gl_spec_t gl_spec = smol_init_gl_spec(2, 0, SMOL_FALSE, SMOL_FALSE, 16, SMOL_TRUE);
#endif
smol_frame_config_t frame_config = {
.width = 800,
.height = 600,
.title = "snek 3D",
.flags = SMOL_FRAME_DEFAULT_CONFIG | SMOL_FRAME_CONFIG_IS_RESIZABLE | SMOL_FRAME_CONFIG_HAS_MAXIMIZE_BUTTON,
.gl_spec = &gl_spec
};
smol_frame_t* frame = smol_frame_create_advanced(&frame_config);
puts(glGetString(GL_VERSION));
puts(glGetString(GL_VENDOR));
#if !defined(__linux__) || !defined(__EMSCRIPTEN__)
smol_gl_set_vsync(SMOL_TRUE);
#endif
smol_gl_font_t font16px = smol_gl_font_create(
&PXF_SMOL_FONT_16X16_DATA[0][0][0],
PXF_SMOL_FONT_16X16_WIDTH,
PXF_SMOL_FONT_16X16_HEIGHT,
&PXF_SMOL_FONT_16X16_OFFSET_X_WIDTH[0][0]
);
smol_gl_font_t font7x8px = smol_font_load_pxf("smol_7x8.pxf");
smol_text_renderer_t text_renderer = smol_text_renderer_create(&font16px, INDICES_PER_65K);
int occupatency_map[6][ARENA_SIDE * ARENA_SIDE];
int num_players = 2;
view_partition_t viewports = create_viewport_partition(0, 0, 800, 600, (vp_spec_t[]) {
(vp_spec_t) {
.is_vertical = 1,
.is_bottom = 1,
.split_percentage = .2f
},
(vp_spec_t) {
.is_vertical = 0,
.is_right = 0,
.split_percentage = num_players > 1 ? .5f : 1.f
},
(vp_spec_t) {
.is_vertical = 0,
.is_right = 0,
.split_percentage = 1.0f
}
}, 1+num_players);
//Max 4 players
snek_t snake[4] = { 0 };
for(int i = 0; i < num_players; i++)
snake[i].cells = malloc(sizeof(snek_cell_t) * 1000);
face_data_t faces[6] = {
{ //Left face
.hor_neighbors = { ARENA_PLANE_BOTTOM, ARENA_PLANE_TOP },
.ver_neighbors = { ARENA_PLANE_BACK, ARENA_PLANE_FRONT },
.positive_per_axis_dir = { 1, -1 },
.vec_idx = { 1, 2 },
.adj_access_axis = { INVALID_AXIS }
},
{ //Bottom face
.hor_neighbors = { ARENA_PLANE_LEFT, ARENA_PLANE_RIGHT },
.ver_neighbors = { ARENA_PLANE_BACK, ARENA_PLANE_FRONT },
.positive_per_axis_dir = { 1, 1 },
.vec_idx = { 0, 2 },
.adj_access_axis = { INVALID_AXIS }
},
{ //Front face
.hor_neighbors = { ARENA_PLANE_LEFT, ARENA_PLANE_RIGHT },
.ver_neighbors = { ARENA_PLANE_BOTTOM, ARENA_PLANE_TOP },
.positive_per_axis_dir = { 1, 1 },
.vec_idx = {0, 1},
.adj_access_axis = { INVALID_AXIS }
},
{ //Right face
.hor_neighbors = { ARENA_PLANE_BOTTOM, ARENA_PLANE_TOP },
.ver_neighbors = { ARENA_PLANE_BACK, ARENA_PLANE_FRONT },
.positive_per_axis_dir = { -1,-1 },
.vec_idx = {1, 2},
.adj_access_axis = { INVALID_AXIS }
},
{ //Top face
.hor_neighbors = { ARENA_PLANE_LEFT, ARENA_PLANE_RIGHT },
.ver_neighbors = { ARENA_PLANE_BACK, ARENA_PLANE_FRONT },
.positive_per_axis_dir = { 1,-1 },
.vec_idx = {0, 2},
.adj_access_axis = { INVALID_AXIS }
},
{ //Back face
.hor_neighbors = { ARENA_PLANE_LEFT, ARENA_PLANE_RIGHT },
.ver_neighbors = { ARENA_PLANE_BOTTOM, ARENA_PLANE_TOP },
.positive_per_axis_dir = { 1, -1 },
.vec_idx = { 0, 1 },
.adj_access_axis = { INVALID_AXIS }
}
};
//Top plane
faces[ARENA_PLANE_TOP].adj_access_axis[ARENA_PLANE_LEFT] = (dir_scalar_t){ X_AXIS, 1 };
faces[ARENA_PLANE_TOP].adj_access_axis[ARENA_PLANE_RIGHT] = (dir_scalar_t){ X_AXIS, -1 };
faces[ARENA_PLANE_TOP].adj_access_axis[ARENA_PLANE_FRONT] = (dir_scalar_t){ Z_AXIS, -1 };
faces[ARENA_PLANE_TOP].adj_access_axis[ARENA_PLANE_BACK] = (dir_scalar_t){ Z_AXIS, 1 };
//Right plane
faces[ARENA_PLANE_RIGHT].adj_access_axis[ARENA_PLANE_TOP] = (dir_scalar_t){ Y_AXIS, -1 };
faces[ARENA_PLANE_RIGHT].adj_access_axis[ARENA_PLANE_BOTTOM] = (dir_scalar_t){ Y_AXIS, 1 };
faces[ARENA_PLANE_RIGHT].adj_access_axis[ARENA_PLANE_BACK] = (dir_scalar_t){ Z_AXIS, 1 };
faces[ARENA_PLANE_RIGHT].adj_access_axis[ARENA_PLANE_FRONT] = (dir_scalar_t){ Z_AXIS, -1 };
//Back plane
faces[ARENA_PLANE_BACK].adj_access_axis[ARENA_PLANE_TOP] = (dir_scalar_t){ Y_AXIS, -1 };
faces[ARENA_PLANE_BACK].adj_access_axis[ARENA_PLANE_BOTTOM] = (dir_scalar_t){ Y_AXIS, 1 };
faces[ARENA_PLANE_BACK].adj_access_axis[ARENA_PLANE_LEFT] = (dir_scalar_t){ X_AXIS, 1 };
faces[ARENA_PLANE_BACK].adj_access_axis[ARENA_PLANE_RIGHT] = (dir_scalar_t){ X_AXIS, -1 };
//Bottom plane
faces[ARENA_PLANE_BOTTOM].adj_access_axis[ARENA_PLANE_LEFT] = (dir_scalar_t){ X_AXIS, 1 };
faces[ARENA_PLANE_BOTTOM].adj_access_axis[ARENA_PLANE_RIGHT] = (dir_scalar_t){ X_AXIS, -1 };
faces[ARENA_PLANE_BOTTOM].adj_access_axis[ARENA_PLANE_FRONT] = (dir_scalar_t){ Z_AXIS, -1 };
faces[ARENA_PLANE_BOTTOM].adj_access_axis[ARENA_PLANE_BACK] = (dir_scalar_t){ Z_AXIS, 1 };
//Left plane
faces[ARENA_PLANE_LEFT].adj_access_axis[ARENA_PLANE_TOP] = (dir_scalar_t){ Y_AXIS, -1};
faces[ARENA_PLANE_LEFT].adj_access_axis[ARENA_PLANE_BOTTOM] = (dir_scalar_t){ Y_AXIS, 1};
faces[ARENA_PLANE_LEFT].adj_access_axis[ARENA_PLANE_BACK] = (dir_scalar_t){ Z_AXIS, 1};
faces[ARENA_PLANE_LEFT].adj_access_axis[ARENA_PLANE_FRONT] =(dir_scalar_t){ Z_AXIS, -1};
//Front plane
faces[ARENA_PLANE_FRONT].adj_access_axis[ARENA_PLANE_TOP] = (dir_scalar_t){ Y_AXIS, -1 };
faces[ARENA_PLANE_FRONT].adj_access_axis[ARENA_PLANE_BOTTOM] = (dir_scalar_t){ Y_AXIS, 1 };
faces[ARENA_PLANE_FRONT].adj_access_axis[ARENA_PLANE_LEFT] = (dir_scalar_t){ X_AXIS, 1 };
faces[ARENA_PLANE_FRONT].adj_access_axis[ARENA_PLANE_RIGHT] = (dir_scalar_t){ X_AXIS, -1 };
//snek_cell_t snek_pieces[5000];
int plane_remap[3] = {0, 1, 2};
int side_remap[3][2] = { { 0, 1 }, { 0, 1 }, { 1, 0 } };
const float snek_scale = 1.f / (float)ARENA_SIDE;
int failed = 0;
for(int i = 0; i < num_players; i++) {
int plane_index = smol_rnd(0, 3);
int side_index = smol_rnd(0, 2);
snake[i].len = 3;
snake[i].plane = plane_remap[plane_index] + (3 * side_remap[plane_index][side_index]);
snake[i].heading = (iv3){ 0, 0, 0 };
snake[i].direction = (iv3){ 0, 0, 0 };
snake[i].heading.c[faces[snake[i].plane].vec_idx[0]] = faces[snake[i].plane].positive_per_axis_dir[0];
snake[i].cells[0].loc[plane_remap[(snake[i].plane + 0) % 3]] = (snake[i].plane < 3) ? -1 : ARENA_SIDE;
snake[i].cells[0].loc[plane_remap[(snake[i].plane + 1) % 3]] = ARENA_SIDE / 2;
snake[i].cells[0].loc[plane_remap[(snake[i].plane + 2) % 3]] = ARENA_SIDE / 2;
snake[i].cells[0].plane = snake[i].plane;
snake[i].next_step = SPEED_FORMULA(0);
snake[i].move_step = snake[i].next_step;
}
snake[0].color = smol_v4(0.f, 0.75f, 1.f, 1.f);
snake[0].key_up = SMOLK_W;
snake[0].key_right = SMOLK_D;
snake[0].key_down = SMOLK_S;
snake[0].key_left = SMOLK_A;
snake[1].color = smol_v4(1.f, 0.75f, 0.f, 1.f);
snake[1].key_up = SMOLK_UP;
snake[1].key_right = SMOLK_RIGHT;
snake[1].key_down = SMOLK_DOWN;
snake[1].key_left = SMOLK_LEFT;
int pickup_pos[3] = {0};
int pickup_plane = 0;
smol_v3_t pickup_draw_coords = { 0.f };
#define RANDOM_PICKUP_POS() \
{ \
int plane_index = smol_rnd(0, 3); \
int side_index = smol_rnd(0, 2); \
\
pickup_pos[(plane_index + 1) % 3] = smol_rnd(0, ARENA_SIDE); \
pickup_pos[(plane_index + 2) % 3] = smol_rnd(0, ARENA_SIDE); \
pickup_pos[plane_index] = -1 + side_index * (ARENA_SIDE+1); \
pickup_plane = plane_remap[plane_index] + (3*side_remap[plane_index][side_index]); \
\
pickup_draw_coords = smol_v3( \
(float)pickup_pos[0] * snek_scale - snek_scale * (float)ARENA_SIDE * .5f + snek_scale*.5f, \
(float)pickup_pos[1] * snek_scale - snek_scale * (float)ARENA_SIDE * .5f + snek_scale*.5f, \
(float)pickup_pos[2] * snek_scale - snek_scale * (float)ARENA_SIDE * .5f + snek_scale*.5f \
); \
}
RANDOM_PICKUP_POS()
int num_cubes = 0;
smol_v3_t verts[] = {
{-.5f, -.5f, -.5f},
{-.5f, +.5f, -.5f},
{+.5f, +.5f, -.5f},
{+.5f, -.5f, -.5f},
{-.5f, -.5f, +.5f},
{-.5f, +.5f, +.5f},
{+.5f, +.5f, +.5f},
{+.5f, -.5f, +.5f},
};
GLuint strip[] = {
0, 3,
4, 7,
6, 3,
2, 0,
1, 4,
5, 6,
1, 2
};
for(int j = 0; j < num_players; j++) {
int plane = snake[j].plane;
int x_dir_idx = faces[plane].vec_idx[0];
for(int i = 1; i < snake[j].len; i++) {
//snake[0].cells[i].x = snake[0].cells[i - 1].x-1;
//snake[0].cells[i].y = snake[0].cells[i - 1].y;
//snake[0].cells[i].z = snake[0].cells[i - 1].z;
snake[j].cells[i].loc[x_dir_idx] = snake[j].cells[i - 1].loc[x_dir_idx];
int next_axis = (x_dir_idx + 1) % 3;
snake[j].cells[i].loc[next_axis] = snake[j].cells[i - 1].loc[next_axis];
next_axis = (x_dir_idx + 2) % 3;
snake[j].cells[i].loc[next_axis] = snake[j].cells[i - 1].loc[next_axis];
snake[j].cells[i].plane = snake[j].cells[i - 1].plane;
//occupied_arena[snek_pieces[i].x + snek_pieces[i].y * ARENA_W] = 1;
}
}
#ifndef __EMSCRIPTEN__
glDebugMessageCallback(debug_message_callback, NULL);
GLuint snek_vertex_shader, snek_fragment_shader;
snek_vertex_shader = create_and_compile_shader_from_file("res/shaders/snek3d.vert", GL_VERTEX_SHADER);
snek_fragment_shader = create_and_compile_shader_from_file("res/shaders/snek3d.frag", GL_FRAGMENT_SHADER);
GLuint text_vertex_shader, text_fragment_shader;
text_vertex_shader = create_and_compile_shader_from_file("res/shaders/text.vert", GL_VERTEX_SHADER);
text_fragment_shader = create_and_compile_shader_from_file("res/shaders/text.frag", GL_FRAGMENT_SHADER);
#else
GLuint snek_vertex_shader, snek_fragment_shader;
snek_vertex_shader = create_and_compile_shader_from_file("res/shaders/snek3d_oes.vert", GL_VERTEX_SHADER);
SMOL_ASSERT(snek_vertex_shader != GL_INVALID_INDEX);
snek_fragment_shader = create_and_compile_shader_from_file("res/shaders/snek3d_oes.frag", GL_FRAGMENT_SHADER);
SMOL_ASSERT(snek_fragment_shader != GL_INVALID_INDEX);
GLuint text_vertex_shader, text_fragment_shader;
text_vertex_shader = create_and_compile_shader_from_file("res/shaders/text_oes.vert", GL_VERTEX_SHADER);
SMOL_ASSERT(text_vertex_shader != GL_INVALID_INDEX);
text_fragment_shader = create_and_compile_shader_from_file("res/shaders/text_oes.frag", GL_FRAGMENT_SHADER);
SMOL_ASSERT(text_fragment_shader != GL_INVALID_INDEX);
#endif
GLuint snek_program = 0;
snek_program = create_shader_program((GLuint[]) {snek_vertex_shader, snek_fragment_shader}, 2);
GLuint text_program = 0;
text_program = create_shader_program((GLuint[]) {text_vertex_shader, text_fragment_shader}, 2);
smol_text_renderer_set_texture_uniform_slot(&text_renderer, glGetUniformLocation(text_program, "uTexture0"), 0);
glEnable(GL_CULL_FACE);
glFrontFace(GL_CCW);
glCullFace(GL_BACK);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
GLuint pos, ibo, inst;
glGenBuffers(1, &pos);
glGenBuffers(1, &ibo);
glGenBuffers(1, &inst);
glBindBuffer(GL_ARRAY_BUFFER, pos);
glBufferData(GL_ARRAY_BUFFER, sizeof(verts), (const void*)verts, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(strip), (const void*)strip, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, inst);
glBufferData(GL_ARRAY_BUFFER, sizeof(cube_inst_t)*MAX_NUM_CUBES, NULL, GL_DYNAMIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
GLuint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, inst);
glEnableVertexAttribArray(0);
glVertexAttribDivisor(0, 1);
glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(cube_inst_t), smol_offset_of(cube_inst_t, pos_scale));
glEnableVertexAttribArray(1);
glVertexAttribDivisor(1, 1);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(cube_inst_t), smol_offset_of(cube_inst_t, color));
glBindBuffer(GL_ARRAY_BUFFER, pos);
glVertexAttribDivisor(2, 0);
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(smol_v3_t), 0);
glBindVertexArray(0);
#define ADD_CUBE() cube_instances[num_cubes++]
#ifndef __EMSCRIPTEN__
cube_inst_t* cube_instances = NULL;
# define BEGIN_CUBES() \
num_cubes=1; \
glBindBuffer(GL_ARRAY_BUFFER, inst); \
SMOL_ASSERT((cube_instances = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE)) != NULL)
# define END_CUBES() \
glUnmapBuffer(GL_ARRAY_BUFFER); \
glBindBuffer(GL_ARRAY_BUFFER, 0)
#else
GLuint buffer_alloc = sizeof(cube_inst_t) * MAX_NUM_CUBES;
cube_inst_t* cube_instances = malloc(buffer_alloc);
# define BEGIN_CUBES() \
num_cubes=1
# define END_CUBES() \
glBindBuffer(GL_ARRAY_BUFFER, inst); \
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(cube_inst_t) * num_cubes, cube_instances); \
glBindBuffer(GL_ARRAY_BUFFER, 0)
#endif
BEGIN_CUBES();
//glBindBuffer(GL_ARRAY_BUFFER, inst);
cube_instances[0] = (cube_inst_t){
.pos_scale = { 0.f, 0.f, 0.f, 1.f },
.color = { 1.f, 1.f, 0.f, 1.f }
};
END_CUBES();
GLuint mvp_location = glGetUniformLocation(snek_program, "uMVP");
GLuint time_location = glGetUniformLocation(snek_program, "uTime");
GLuint mvp_text_location = glGetUniformLocation(text_program, "uMVP");
//glClearColor(1.f, 1.f, 1.f, 1.0f);
float fov = 45.f;
smol_m4_t snek_projection_mat[4];
smol_m4_t game_overlay_2d_projection[4];
smol_m4_t snek_view_mat = smol_m4_translate_xyz(0.f, 0.f, 2.f);
smol_m4_t text_projection = { 0.f };
smol_m4_t view_rot = smol_m4_identity();
int w, h;
get_viewport_size(&viewports, 0, &w, &h);
text_projection = smol_m4_ortho_lh(0.f, (float)w, 0.f, (float)h, -1.f, 1.f);
float aratio;
for(int i = 0; i < num_players; i++) {
get_viewport_aspect_ratio(&viewports, 1+i, &aratio);
snek_projection_mat[i] = smol_m4_perspective_lh(SMOL_DEG_TO_RAD(fov), aratio, 1e-2f, 1e+3f);
get_viewport_size(&viewports, 1+i, &w, &h);
game_overlay_2d_projection[i] = smol_m4_ortho_lh(0.f, (float)w, 0.f, (float)h, -1.f, 1.f);
}
#define DEBUG_CAMERA 0
smol_quat_t cur_orient[4] = {
smol_quat_identity(),
smol_quat_identity(),
smol_quat_identity(),
smol_quat_identity()
};
#if DEBUG_CAMERA
smol_v3_t camera_dir = { 0.f };
smol_v3_t camera_pos = smol_v3(0.f, 1.2f, 1.2f);
smol_v3_t camera_side = smol_v3(1.f, 0.f, 0.f);
float rot_y = 0.f;
float rot_x = SMOL_DEG_TO_RAD(-30.f);
camera_dir.x =-sinf(rot_y) * cosf(rot_x);
camera_dir.z =-cosf(rot_y) * cosf(rot_x);
camera_dir.y = sinf(rot_x);
camera_side.x = cos(rot_y);
camera_side.z =-sin(rot_y);
#endif
double loop_start = smol_timer();
double dt = 0.;
while(!smol_frame_is_closed(frame)) {
double frame_start = smol_timer();
double time = (frame_start - loop_start);
if(dt > 0.1) dt = 0.;
smol_frame_update(frame);
smol_inputs_flush();
for(smol_frame_event_t e; smol_frame_acquire_event(frame, &e);) {
switch(e.type) {
case SMOL_FRAME_EVENT_RESIZE: {
//glViewport(0, 0, e.size.width, e.size.height);
update_view_partition(&viewports, 0, 0, e.size.width, e.size.height);
int w, h;
get_viewport_size(&viewports, 0, &w, &h);
text_projection = smol_m4_ortho_lh(0.f, (float)w, 0.f, (float)h, -1.f, 1.f);
for(int i = 0; i < num_players; i++) {
float aratio;
get_viewport_aspect_ratio(&viewports, 1+i, &aratio);
snek_projection_mat[i] = smol_m4_perspective_lh(SMOL_DEG_TO_RAD(fov), aratio, 1e-2f, 1e+3f);
get_viewport_size(&viewports, 1+i, &w, &h);
game_overlay_2d_projection[i] = smol_m4_ortho_lh(0.f, (float)w, 0.f, (float)h, -1.f, 1.f);
}
} break;
default: break;
}
smol_inputs_update(&e);
}
#if DEBUG_CAMERA
if(smol_mouse_hit(1)) smol_frame_set_cursor_visibility(frame, 0);
if(smol_mouse_up(1)) smol_frame_set_cursor_visibility(frame, 1);
if(smol_mouse_down(1)) {
rot_y -= (float)smol_mouse_move_x()*(float)SMOL_PI/180.f;
rot_x -= (float)smol_mouse_move_y()*(float)SMOL_PI/180.f;
camera_dir.x =-sinf(rot_y) * cosf(rot_x);
camera_dir.z =-cosf(rot_y) * cosf(rot_x);
camera_dir.y = sinf(rot_x);
camera_side.x = cos(rot_y);
camera_side.z =-sin(rot_y);
}
if(smol_key_down(SMOLK_W)) camera_pos = smol_v3_add(camera_pos, smol_v3_mul(dt*10.f, camera_dir));
if(smol_key_down(SMOLK_S)) camera_pos = smol_v3_sub(camera_pos, smol_v3_mul(dt*10.f, camera_dir));
if(smol_key_down(SMOLK_D)) camera_pos = smol_v3_add(camera_pos, smol_v3_mul(dt*10.f, camera_side));
if(smol_key_down(SMOLK_A)) camera_pos = smol_v3_sub(camera_pos, smol_v3_mul(dt*10.f, camera_side));
#endif
for(int i = 0; i < num_players; i++) {
if(smol_key_hit(snake[i].key_up) && snake[i].heading.c[faces[snake[i].plane].vec_idx[0]] != 0) {
snake[i].heading.c[faces[snake[i].plane].vec_idx[1]] = faces[snake[i].plane].positive_per_axis_dir[1];
snake[i].heading.c[faces[snake[i].plane].vec_idx[0]] = 0;
}
if(smol_key_hit(snake[i].key_down) && snake[i].heading.c[faces[snake[i].plane].vec_idx[0]] != 0) {
snake[i].heading.c[faces[snake[i].plane].vec_idx[1]] = -faces[snake[i].plane].positive_per_axis_dir[1];
snake[i].heading.c[faces[snake[i].plane].vec_idx[0]] = 0;
}
if(smol_key_hit(snake[i].key_left) && snake[i].heading.c[faces[snake[i].plane].vec_idx[1]] != 0) {
snake[i].heading.c[faces[snake[i].plane].vec_idx[1]] = 0;
snake[i].heading.c[faces[snake[i].plane].vec_idx[0]] = -faces[snake[i].plane].positive_per_axis_dir[0];
}
if(smol_key_hit(snake[i].key_right) && snake[i].heading.c[faces[snake[i].plane].vec_idx[1]] != 0) {
snake[i].heading.c[faces[snake[i].plane].vec_idx[1]] = 0;
snake[i].heading.c[faces[snake[i].plane].vec_idx[0]] = faces[snake[i].plane].positive_per_axis_dir[0];
}
}
for(int pl_idx = 0; pl_idx < num_players; pl_idx++) {
#if 1
if(snake[pl_idx].move_step <= 0.) {
snake[pl_idx].direction.c[0] = snake[pl_idx].heading.c[0];
snake[pl_idx].direction.c[1] = snake[pl_idx].heading.c[1];
snake[pl_idx].direction.c[2] = snake[pl_idx].heading.c[2];
//Remove occupation from tail
snek_cell_t* cell = &snake[pl_idx].cells[snake[pl_idx].len-1];
char* axis = faces[cell->plane].vec_idx;
//occupatency_map[cell->plane][cell->loc[axis[0]] + cell->loc[axis[1]] * ARENA_SIDE] = 0;
//printf("Starting to update player #%d cells..", pl_idx);
for(int i = snake[pl_idx].len - 1; i > 0; i--) {
snake[pl_idx].cells[i].x = snake[pl_idx].cells[i - 1].x;
snake[pl_idx].cells[i].y = snake[pl_idx].cells[i - 1].y;
snake[pl_idx].cells[i].z = snake[pl_idx].cells[i - 1].z;
snake[pl_idx].cells[i].plane = snake[pl_idx].cells[i - 1].plane;
}
//printf("Ending to update player #%d cells..", pl_idx);
snake[pl_idx].cells[0].loc[faces[snake[pl_idx].plane].vec_idx[0]] += snake[pl_idx].direction.c[faces[snake[pl_idx].plane].vec_idx[0]];
snake[pl_idx].cells[0].loc[faces[snake[pl_idx].plane].vec_idx[1]] += snake[pl_idx].direction.c[faces[snake[pl_idx].plane].vec_idx[1]];
//"Horizontally" under bounds
if(snake[pl_idx].cells[0].loc[faces[snake[pl_idx].plane].vec_idx[0]] < 0 && snake[pl_idx].direction.c[faces[snake[pl_idx].plane].vec_idx[0]] < 0) {
int axis = faces[snake[pl_idx].plane].vec_idx[0];
int prev_plane = snake[pl_idx].plane;
snake[pl_idx].direction.c[axis] = snake[pl_idx].heading.c[axis] = 0;
snake[pl_idx].plane = faces[snake[pl_idx].plane].hor_neighbors[0];
axis = faces[snake[pl_idx].plane].vec_idx[0];
snake[pl_idx].direction.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] =
snake[pl_idx].heading.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] = faces[snake[pl_idx].plane].adj_access_axis[prev_plane].scalar;
}
//"Horizontally" over bounds
if(snake[pl_idx].cells[0].loc[faces[snake[pl_idx].plane].vec_idx[0]] > (ARENA_SIDE-1) && snake[pl_idx].direction.c[faces[snake[pl_idx].plane].vec_idx[0]] > 0) {
int axis = faces[snake[pl_idx].plane].vec_idx[0];
int prev_plane = snake[pl_idx].plane;
snake[pl_idx].direction.c[axis] = snake[pl_idx].heading.c[axis] = 0;
snake[pl_idx].plane = faces[snake[pl_idx].plane].hor_neighbors[1];
axis = faces[snake[pl_idx].plane].vec_idx[0];
snake[pl_idx].direction.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] =
snake[pl_idx].heading.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] = faces[snake[pl_idx].plane].adj_access_axis[prev_plane].scalar;
}
//"Vertically" under bounds
if(snake[pl_idx].cells[0].loc[faces[snake[pl_idx].plane].vec_idx[1]] < 0 && snake[pl_idx].direction.c[faces[snake[pl_idx].plane].vec_idx[1]] < 0) {
int axis = faces[snake[pl_idx].plane].vec_idx[1];
int prev_plane = snake[pl_idx].plane;
snake[pl_idx].direction.c[axis] = snake[pl_idx].heading.c[axis] = 0;
snake[pl_idx].plane = faces[snake[pl_idx].plane].ver_neighbors[0];
axis = faces[snake[pl_idx].plane].vec_idx[0];
snake[pl_idx].direction.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] =
snake[pl_idx].heading.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] = faces[snake[pl_idx].plane].adj_access_axis[prev_plane].scalar;
}
//"Vertically" over bounds
if(snake[pl_idx].cells[0].loc[faces[snake[pl_idx].plane].vec_idx[1]] > (ARENA_SIDE-1) && snake[pl_idx].direction.c[faces[snake[pl_idx].plane].vec_idx[1]] > 0) {
int axis = faces[snake[pl_idx].plane].vec_idx[1];
int prev_plane = snake[pl_idx].plane;
snake[pl_idx].direction.c[axis] = snake[pl_idx].heading.c[axis] = 0;
snake[pl_idx].plane = faces[snake[pl_idx].plane].ver_neighbors[1];
axis = faces[snake[pl_idx].plane].vec_idx[0];
snake[pl_idx].direction.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] =
snake[pl_idx].heading.c[faces[snake[pl_idx].plane].adj_access_axis[prev_plane].prev_face] = faces[snake[pl_idx].plane].adj_access_axis[prev_plane].scalar;
}
//Add occupation to head
//occupied_arena[snek_pieces[0].x + snek_pieces[0].y * ARENA_W] = 1;
for(int i = 1; i < snake[pl_idx].len; i++) {
if(
snake[pl_idx].cells[0].x == snake[pl_idx].cells[i].x &&
snake[pl_idx].cells[0].y == snake[pl_idx].cells[i].y &&
snake[pl_idx].cells[0].z == snake[pl_idx].cells[i].z
) {
failed = 1;
break;
}
}
if(
snake[pl_idx].cells[0].x == pickup_pos[0] &&
snake[pl_idx].cells[0].y == pickup_pos[1] &&
snake[pl_idx].cells[0].z == pickup_pos[2]
) {
snake[pl_idx].cells[snake[pl_idx].len].x = snake[pl_idx].cells[snake[pl_idx].len-1].x;
snake[pl_idx].cells[snake[pl_idx].len].y = snake[pl_idx].cells[snake[pl_idx].len-1].y;
snake[pl_idx].cells[snake[pl_idx].len].z = snake[pl_idx].cells[snake[pl_idx].len-1].z;
RANDOM_PICKUP_POS()
//while(occupied_arena[pickup_x + pickup_y * ARENA_W]) {
// pickup_x = rand() % ARENA_W;
// pickup_y = rand() % ARENA_H;
//}
snake[pl_idx].len++;
snake[pl_idx].next_step = SPEED_FORMULA(0);
if(snake[pl_idx].next_step < 0.) snake[pl_idx].next_step = 0.;
}
cell = &snake[pl_idx].cells[0];
//occupatency_map[cell->plane][cell->loc[axis[0]] + cell->loc[axis[1]] * ARENA_SIDE] = pl_idx;
snake[pl_idx].move_step = snake[pl_idx].next_step;
}
else {
snake[pl_idx].move_step -= dt;
}
#endif
//snek_view_mat = smol_m4_translate_vec(smol_v3_neg(camera_pos));
//smol_m4_t view_rot = smol_m4_mul(smol_m4_rotate_x(rot_x), smol_m4_rotate_y(rot_y));
smol_quat_t orient = { 0.f };
switch(snake[pl_idx].plane) {
case ARENA_PLANE_LEFT:
orient = smol_quat_rotate_z(SMOL_PI * .5f);
break;
case ARENA_PLANE_BOTTOM:
orient = smol_quat_rotate_x(-SMOL_PI);
break;
case ARENA_PLANE_FRONT:
orient = smol_quat_rotate_x(SMOL_PI * .5f);
break;
case ARENA_PLANE_RIGHT:
orient = smol_quat_rotate_z(-SMOL_PI * .5f);
break;
case ARENA_PLANE_TOP:
orient = smol_quat_identity();
break;
case ARENA_PLANE_BACK:
orient = smol_quat_rotate_x(-SMOL_PI * .5f);
break;
}