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basic input, frame timing, and other minor setup

main
Brett 2023-12-29 18:38:07 -05:00
parent b770baa78d
commit b5d707f5c7
13 changed files with 5729 additions and 28 deletions
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3
.gitmodules vendored
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@ -4,3 +4,6 @@
[submodule "libraries/imgui"]
path = libraries/imgui
url = https://github.com/ocornut/imgui
[submodule "libraries/openal-soft"]
path = libraries/openal-soft
url = https://github.com/kcat/openal-soft.git

2
CMakeLists.txt
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@ -24,6 +24,7 @@ else ()
set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
add_subdirectory(libraries/glfw-3.3.8)
add_subdirectory(libraries/openal-soft)
endif ()
add_subdirectory(libraries/BLT)
@ -113,6 +114,7 @@ if (EMSCRIPTEN)
target_link_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Wpedantic -Wno-comment -Wno-strict-aliasing)
else ()
target_link_libraries(BLT_WITH_GRAPHICS PUBLIC glfw)
target_link_libraries(BLT_WITH_GRAPHICS PUBLIC OpenAL)
target_compile_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Werror -Wpedantic -Wno-comment -Wno-strict-aliasing -Wno-unused-function)
target_link_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Werror -Wpedantic -Wno-comment -Wno-strict-aliasing -Wno-unused-function)

39
include/blt/gfx/state.h
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@ -28,30 +28,40 @@ namespace blt::gfx
/**
* layout (std140) uniform GlobalMatrices
* {
* mat4 projection;
* mat4 view;
* mat4 pvm;
* mat4 perspective; // full 3d perspective matrix
* mat4 ortho; // full 2d orthographic matrix
* mat4 view; // view matrix
* mat4 pvm; // perspective view matrix
* mat4 ovm; // ortho view matrix
* };
*/
class matrix_state_manager
{
private:
blt::mat4x4 perspective;
blt::mat4x4 ortho;
blt::mat4x4 view;
blt::mat4x4 pv;
blt::mat4x4 pvm;
blt::mat4x4 ovm;
std::int32_t last_width = 0, last_height = 0;
uniform_buffer* global_matrix_ubo = nullptr;
public:
[[nodiscard]] inline const blt::mat4x4& computedPV() const
[[nodiscard]] inline const blt::mat4x4& computedPVM() const
{
return pv;
return pvm;
}
[[nodiscard]] inline const blt::mat4x4& computedOVM() const
{
return ovm;
}
void create_internals()
{
global_matrix_ubo = new uniform_buffer(sizeof(blt::mat4x4) * 3);
global_matrix_ubo = new uniform_buffer(sizeof(blt::mat4x4) * 5);
}
void delete_internals()
void cleanup()
{
delete global_matrix_ubo;
}
@ -59,15 +69,24 @@ namespace blt::gfx
template<typename U>
void setView(U&& mat)
{
view = std::forward(mat);
view = mat;
}
template<typename U>
void setPerspective(U&& mat)
{
perspective = std::forward(mat);
perspective = mat;
}
template<typename U>
void setOrtho(U&& mat)
{
ortho = mat;
}
void update_perspectives(std::int32_t width, std::int32_t height, float fov = 90, float near = 0.1f, float far = 500.0f,
float ortho_near = -1, float ortho_far = 1);
void update();
};

350
include/blt/gfx/stb/stb_vorbis.h Normal file
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@ -0,0 +1,350 @@
//////////////////////////////////////////////////////////////////////////////
//
// HEADER BEGINS HERE
//
#ifndef STB_VORBIS_INCLUDE_STB_VORBIS_H
#define STB_VORBIS_INCLUDE_STB_VORBIS_H
#if defined(STB_VORBIS_NO_CRT) && !defined(STB_VORBIS_NO_STDIO)
#define STB_VORBIS_NO_STDIO 1
#endif
#ifndef STB_VORBIS_NO_STDIO
#include <stdio.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/////////// THREAD SAFETY
// Individual stb_vorbis* handles are not thread-safe; you cannot decode from
// them from multiple threads at the same time. However, you can have multiple
// stb_vorbis* handles and decode from them independently in multiple thrads.
/////////// MEMORY ALLOCATION
// normally stb_vorbis uses malloc() to allocate memory at startup,
// and alloca() to allocate temporary memory during a frame on the
// stack. (Memory consumption will depend on the amount of setup
// data in the file and how you set the compile flags for speed
// vs. size. In my test files the maximal-size usage is ~150KB.)
//
// You can modify the wrapper functions in the source (setup_malloc,
// setup_temp_malloc, temp_malloc) to change this behavior, or you
// can use a simpler allocation model: you pass in a buffer from
// which stb_vorbis will allocate _all_ its memory (including the
// temp memory). "open" may fail with a VORBIS_outofmem if you
// do not pass in enough data; there is no way to determine how
// much you do need except to succeed (at which point you can
// query get_info to find the exact amount required. yes I know
// this is lame).
//
// If you pass in a non-NULL buffer of the type below, allocation
// will occur from it as described above. Otherwise just pass NULL
// to use malloc()/alloca()
typedef struct
{
char *alloc_buffer;
int alloc_buffer_length_in_bytes;
} stb_vorbis_alloc;
/////////// FUNCTIONS USEABLE WITH ALL INPUT MODES
typedef struct stb_vorbis stb_vorbis;
typedef struct
{
unsigned int sample_rate;
int channels;
unsigned int setup_memory_required;
unsigned int setup_temp_memory_required;
unsigned int temp_memory_required;
int max_frame_size;
} stb_vorbis_info;
typedef struct
{
char *vendor;
int comment_list_length;
char **comment_list;
} stb_vorbis_comment;
// get general information about the file
extern stb_vorbis_info stb_vorbis_get_info(stb_vorbis *f);
// get ogg comments
extern stb_vorbis_comment stb_vorbis_get_comment(stb_vorbis *f);
// get the last error detected (clears it, too)
extern int stb_vorbis_get_error(stb_vorbis *f);
// close an ogg vorbis file and free all memory in use
extern void stb_vorbis_close(stb_vorbis *f);
// this function returns the offset (in samples) from the beginning of the
// file that will be returned by the next decode, if it is known, or -1
// otherwise. after a flush_pushdata() call, this may take a while before
// it becomes valid again.
// NOT WORKING YET after a seek with PULLDATA API
extern int stb_vorbis_get_sample_offset(stb_vorbis *f);
// returns the current seek point within the file, or offset from the beginning
// of the memory buffer. In pushdata mode it returns 0.
extern unsigned int stb_vorbis_get_file_offset(stb_vorbis *f);
/////////// PUSHDATA API
#ifndef STB_VORBIS_NO_PUSHDATA_API
// this API allows you to get blocks of data from any source and hand
// them to stb_vorbis. you have to buffer them; stb_vorbis will tell
// you how much it used, and you have to give it the rest next time;
// and stb_vorbis may not have enough data to work with and you will
// need to give it the same data again PLUS more. Note that the Vorbis
// specification does not bound the size of an individual frame.
extern stb_vorbis *stb_vorbis_open_pushdata(
const unsigned char * datablock, int datablock_length_in_bytes,
int *datablock_memory_consumed_in_bytes,
int *error,
const stb_vorbis_alloc *alloc_buffer);
// create a vorbis decoder by passing in the initial data block containing
// the ogg&vorbis headers (you don't need to do parse them, just provide
// the first N bytes of the file--you're told if it's not enough, see below)
// on success, returns an stb_vorbis *, does not set error, returns the amount of
// data parsed/consumed on this call in *datablock_memory_consumed_in_bytes;
// on failure, returns NULL on error and sets *error, does not change *datablock_memory_consumed
// if returns NULL and *error is VORBIS_need_more_data, then the input block was
// incomplete and you need to pass in a larger block from the start of the file
extern int stb_vorbis_decode_frame_pushdata(
stb_vorbis *f,
const unsigned char *datablock, int datablock_length_in_bytes,
int *channels, // place to write number of float * buffers
float ***output, // place to write float ** array of float * buffers
int *samples // place to write number of output samples
);
// decode a frame of audio sample data if possible from the passed-in data block
//
// return value: number of bytes we used from datablock
//
// possible cases:
// 0 bytes used, 0 samples output (need more data)
// N bytes used, 0 samples output (resynching the stream, keep going)
// N bytes used, M samples output (one frame of data)
// note that after opening a file, you will ALWAYS get one N-bytes,0-sample
// frame, because Vorbis always "discards" the first frame.
//
// Note that on resynch, stb_vorbis will rarely consume all of the buffer,
// instead only datablock_length_in_bytes-3 or less. This is because it wants
// to avoid missing parts of a page header if they cross a datablock boundary,
// without writing state-machiney code to record a partial detection.
//
// The number of channels returned are stored in *channels (which can be
// NULL--it is always the same as the number of channels reported by
// get_info). *output will contain an array of float* buffers, one per
// channel. In other words, (*output)[0][0] contains the first sample from
// the first channel, and (*output)[1][0] contains the first sample from
// the second channel.
//
// *output points into stb_vorbis's internal output buffer storage; these
// buffers are owned by stb_vorbis and application code should not free
// them or modify their contents. They are transient and will be overwritten
// once you ask for more data to get decoded, so be sure to grab any data
// you need before then.
extern void stb_vorbis_flush_pushdata(stb_vorbis *f);
// inform stb_vorbis that your next datablock will not be contiguous with
// previous ones (e.g. you've seeked in the data); future attempts to decode
// frames will cause stb_vorbis to resynchronize (as noted above), and
// once it sees a valid Ogg page (typically 4-8KB, as large as 64KB), it
// will begin decoding the _next_ frame.
//
// if you want to seek using pushdata, you need to seek in your file, then
// call stb_vorbis_flush_pushdata(), then start calling decoding, then once
// decoding is returning you data, call stb_vorbis_get_sample_offset, and
// if you don't like the result, seek your file again and repeat.
#endif
////////// PULLING INPUT API
#ifndef STB_VORBIS_NO_PULLDATA_API
// This API assumes stb_vorbis is allowed to pull data from a source--
// either a block of memory containing the _entire_ vorbis stream, or a
// FILE * that you or it create, or possibly some other reading mechanism
// if you go modify the source to replace the FILE * case with some kind
// of callback to your code. (But if you don't support seeking, you may
// just want to go ahead and use pushdata.)
#if !defined(STB_VORBIS_NO_STDIO) && !defined(STB_VORBIS_NO_INTEGER_CONVERSION)
extern int stb_vorbis_decode_filename(const char *filename, int *channels, int *sample_rate, short **output);
#endif
#if !defined(STB_VORBIS_NO_INTEGER_CONVERSION)
extern int stb_vorbis_decode_memory(const unsigned char *mem, int len, int *channels, int *sample_rate, short **output);
#endif
// decode an entire file and output the data interleaved into a malloc()ed
// buffer stored in *output. The return value is the number of samples
// decoded, or -1 if the file could not be opened or was not an ogg vorbis file.
// When you're done with it, just free() the pointer returned in *output.
extern stb_vorbis * stb_vorbis_open_memory(const unsigned char *data, int len,
int *error, const stb_vorbis_alloc *alloc_buffer);
// create an ogg vorbis decoder from an ogg vorbis stream in memory (note
// this must be the entire stream!). on failure, returns NULL and sets *error
#ifndef STB_VORBIS_NO_STDIO
extern stb_vorbis * stb_vorbis_open_filename(const char *filename,
int *error, const stb_vorbis_alloc *alloc_buffer);
// create an ogg vorbis decoder from a filename via fopen(). on failure,
// returns NULL and sets *error (possibly to VORBIS_file_open_failure).
extern stb_vorbis * stb_vorbis_open_file(FILE *f, int close_handle_on_close,
int *error, const stb_vorbis_alloc *alloc_buffer);
// create an ogg vorbis decoder from an open FILE *, looking for a stream at
// the _current_ seek point (ftell). on failure, returns NULL and sets *error.
// note that stb_vorbis must "own" this stream; if you seek it in between
// calls to stb_vorbis, it will become confused. Moreover, if you attempt to
// perform stb_vorbis_seek_*() operations on this file, it will assume it
// owns the _entire_ rest of the file after the start point. Use the next
// function, stb_vorbis_open_file_section(), to limit it.
extern stb_vorbis * stb_vorbis_open_file_section(FILE *f, int close_handle_on_close,
int *error, const stb_vorbis_alloc *alloc_buffer, unsigned int len);
// create an ogg vorbis decoder from an open FILE *, looking for a stream at
// the _current_ seek point (ftell); the stream will be of length 'len' bytes.
// on failure, returns NULL and sets *error. note that stb_vorbis must "own"
// this stream; if you seek it in between calls to stb_vorbis, it will become
// confused.
#endif
extern int stb_vorbis_seek_frame(stb_vorbis *f, unsigned int sample_number);
extern int stb_vorbis_seek(stb_vorbis *f, unsigned int sample_number);
// these functions seek in the Vorbis file to (approximately) 'sample_number'.
// after calling seek_frame(), the next call to get_frame_*() will include
// the specified sample. after calling stb_vorbis_seek(), the next call to
// stb_vorbis_get_samples_* will start with the specified sample. If you
// do not need to seek to EXACTLY the target sample when using get_samples_*,
// you can also use seek_frame().
extern int stb_vorbis_seek_start(stb_vorbis *f);
// this function is equivalent to stb_vorbis_seek(f,0)
extern unsigned int stb_vorbis_stream_length_in_samples(stb_vorbis *f);
extern float stb_vorbis_stream_length_in_seconds(stb_vorbis *f);
// these functions return the total length of the vorbis stream
extern int stb_vorbis_get_frame_float(stb_vorbis *f, int *channels, float ***output);
// decode the next frame and return the number of samples. the number of
// channels returned are stored in *channels (which can be NULL--it is always
// the same as the number of channels reported by get_info). *output will
// contain an array of float* buffers, one per channel. These outputs will
// be overwritten on the next call to stb_vorbis_get_frame_*.
//
// You generally should not intermix calls to stb_vorbis_get_frame_*()
// and stb_vorbis_get_samples_*(), since the latter calls the former.
#ifndef STB_VORBIS_NO_INTEGER_CONVERSION
extern int stb_vorbis_get_frame_short_interleaved(stb_vorbis *f, int num_c, short *buffer, int num_shorts);
extern int stb_vorbis_get_frame_short (stb_vorbis *f, int num_c, short **buffer, int num_samples);
#endif
// decode the next frame and return the number of *samples* per channel.
// Note that for interleaved data, you pass in the number of shorts (the
// size of your array), but the return value is the number of samples per
// channel, not the total number of samples.
//
// The data is coerced to the number of channels you request according to the
// channel coercion rules (see below). You must pass in the size of your
// buffer(s) so that stb_vorbis will not overwrite the end of the buffer.
// The maximum buffer size needed can be gotten from get_info(); however,
// the Vorbis I specification implies an absolute maximum of 4096 samples
// per channel.
// Channel coercion rules:
// Let M be the number of channels requested, and N the number of channels present,
// and Cn be the nth channel; let stereo L be the sum of all L and center channels,
// and stereo R be the sum of all R and center channels (channel assignment from the
// vorbis spec).
// M N output
// 1 k sum(Ck) for all k
// 2 * stereo L, stereo R
// k l k > l, the first l channels, then 0s
// k l k <= l, the first k channels
// Note that this is not _good_ surround etc. mixing at all! It's just so
// you get something useful.
extern int stb_vorbis_get_samples_float_interleaved(stb_vorbis *f, int channels, float *buffer, int num_floats);
extern int stb_vorbis_get_samples_float(stb_vorbis *f, int channels, float **buffer, int num_samples);
// gets num_samples samples, not necessarily on a frame boundary--this requires
// buffering so you have to supply the buffers. DOES NOT APPLY THE COERCION RULES.
// Returns the number of samples stored per channel; it may be less than requested
// at the end of the file. If there are no more samples in the file, returns 0.
#ifndef STB_VORBIS_NO_INTEGER_CONVERSION
extern int stb_vorbis_get_samples_short_interleaved(stb_vorbis *f, int channels, short *buffer, int num_shorts);
extern int stb_vorbis_get_samples_short(stb_vorbis *f, int channels, short **buffer, int num_samples);
#endif
// gets num_samples samples, not necessarily on a frame boundary--this requires
// buffering so you have to supply the buffers. Applies the coercion rules above
// to produce 'channels' channels. Returns the number of samples stored per channel;
// it may be less than requested at the end of the file. If there are no more
// samples in the file, returns 0.
#endif
//////// ERROR CODES
enum STBVorbisError
{
VORBIS__no_error,
VORBIS_need_more_data=1, // not a real error
VORBIS_invalid_api_mixing, // can't mix API modes
VORBIS_outofmem, // not enough memory
VORBIS_feature_not_supported, // uses floor 0
VORBIS_too_many_channels, // STB_VORBIS_MAX_CHANNELS is too small
VORBIS_file_open_failure, // fopen() failed
VORBIS_seek_without_length, // can't seek in unknown-length file
VORBIS_unexpected_eof=10, // file is truncated?
VORBIS_seek_invalid, // seek past EOF
// decoding errors (corrupt/invalid stream) -- you probably
// don't care about the exact details of these
// vorbis errors:
VORBIS_invalid_setup=20,
VORBIS_invalid_stream,
// ogg errors:
VORBIS_missing_capture_pattern=30,
VORBIS_invalid_stream_structure_version,
VORBIS_continued_packet_flag_invalid,
VORBIS_incorrect_stream_serial_number,
VORBIS_invalid_first_page,
VORBIS_bad_packet_type,
VORBIS_cant_find_last_page,
VORBIS_seek_failed,
VORBIS_ogg_skeleton_not_supported
};
#ifdef __cplusplus
}
#endif
#endif // STB_VORBIS_INCLUDE_STB_VORBIS_H
//
// HEADER ENDS HERE
//
//////////////////////////////////////////////////////////////////////////////

2
include/blt/gfx/texture.h
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@ -166,7 +166,7 @@ namespace blt::gfx
struct texture_gl2D : public texture_gl
{
public:
texture_gl2D(const texture_data& data);
explicit texture_gl2D(const texture_data& data);
texture_gl2D(int width, int height, GLint colorMode = GL_RGBA8);

6
include/blt/gfx/window.h
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@ -84,6 +84,12 @@ namespace blt::gfx
bool isKeyPressed(int key);
double getFrameDeltaSeconds();
double getFrameDeltaMilliseconds();
std::int64_t getFrameDelta();
void cleanup();
}

2
libraries/imgui

@ -1 +1 @@
Subproject commit 4a2426449a4c65028c65c68ed9426495dec251e4
Subproject commit 240ab5890b2e8da294937a1710b021ac3f271472

1
libraries/openal-soft Submodule

@ -0,0 +1 @@
Subproject commit cfab14287405a0d34f6a0fec1336f46415728fcf

24
src/blt/gfx/state.cpp
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@ -20,9 +20,25 @@
void blt::gfx::matrix_state_manager::update()
{
pv = perspective * view;
BLT_ASSERT(global_matrix_ubo != nullptr && "You forgot to call create_internals(). Make sure you call delete_internals() as well!");
pvm = perspective * view;
ovm = ortho * view;
BLT_ASSERT(global_matrix_ubo != nullptr && "You forgot to call create_internals(). Make sure you call cleanup() as well!");
global_matrix_ubo->upload((void*)perspective.ptr(), sizeof(blt::mat4x4), 0);
global_matrix_ubo->upload((void*)view.ptr(), sizeof(blt::mat4x4), sizeof(blt::mat4x4));
global_matrix_ubo->upload((void*)pv.ptr(), sizeof(blt::mat4x4), sizeof(blt::mat4x4));
global_matrix_ubo->upload((void*)ortho.ptr(), sizeof(blt::mat4x4), sizeof(blt::mat4x4));
global_matrix_ubo->upload((void*)view.ptr(), sizeof(blt::mat4x4), sizeof(blt::mat4x4) * 2);
global_matrix_ubo->upload((void*)pvm.ptr(), sizeof(blt::mat4x4), sizeof(blt::mat4x4) * 3);
global_matrix_ubo->upload((void*)ovm.ptr(), sizeof(blt::mat4x4), sizeof(blt::mat4x4) * 4);
}
void blt::gfx::matrix_state_manager::update_perspectives(std::int32_t width, std::int32_t height, float fov, float near, float far, float ortho_near,
float ortho_far)
{
if (width != last_width || height != last_height)
{
last_width = width;
last_height = height;
perspective = blt::perspective(fov, (float)width / (float)height, near, far);
ortho = blt::ortho(0, (float)width, (float)height, 0, ortho_near, ortho_far);
}
}

5234
src/blt/gfx/stb/stb_vorbis.cpp Normal file
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File diff suppressed because it is too large Load Diff

27
src/blt/gfx/window.cpp
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@ -6,6 +6,7 @@
#include <blt/gfx/window.h>
#include <blt/std/assert.h>
#include <blt/std/logging.h>
#include <blt/std/time.h>
#include <blt/gfx/input.h>
#include <queue>
#include <imgui.h>
@ -33,6 +34,10 @@ namespace blt::gfx
/* current width and height of the window */
std::int32_t width = 0;
std::int32_t height = 0;
std::int64_t lastTime = blt::system::nanoTime();
std::int64_t deltaTime = 0;
double nanoDelta = 0;
double millisDelta = 0;
} window_state;
void create_callbacks()
@ -156,6 +161,13 @@ namespace blt::gfx
/* -- Update GLFW state -- */
glfwSwapBuffers(window_state.window);
glfwPollEvents();
/* -- Update Frame Timing Information -- */
auto current_time = blt::system::nanoTime();
window_state.deltaTime = current_time - window_state.lastTime;
window_state.lastTime = current_time;
window_state.nanoDelta = static_cast<double>(window_state.deltaTime) / 1e9f;
window_state.millisDelta = static_cast<double>(window_state.deltaTime) / 1e6f;
}
void init(const window_data& data)
@ -298,4 +310,19 @@ namespace blt::gfx
{
return window_state.inputManager.isKeyPressed(key);
}
double getFrameDeltaSeconds()
{
return window_state.nanoDelta;
}
double getFrameDeltaMilliseconds()
{
return window_state.millisDelta;
}
std::int64_t getFrameDelta()
{
return window_state.deltaTime;
}
}

6
tests/include/shaders/test.vert
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@ -13,13 +13,17 @@ out vec2 uv;
layout (std140) uniform GlobalMatrices
{
mat4 projection;
mat4 ortho;
mat4 view;
mat4 pvm;
mat4 ovm;
};
uniform mat4 model;
void main() {
//gl_Position = projection * view * vec4(vertex.x, vertex.y, vertex.z, 1.0);
gl_Position = vec4(vertex, 1.0);
gl_Position = ovm * model * vec4(vertex, 1.0);
pos = vertex.xy;
uv = uv_in;
}

61
tests/src/main.cpp
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@ -2,6 +2,7 @@
#include <blt/gfx/shader.h>
#include <blt/gfx/texture.h>
#include <blt/gfx/model.h>
#include <blt/gfx/state.h>
#include <blt/std/logging.h>
#include <imgui.h>
#include "blt/gfx/imgui/IconsFontAwesome5.h"
@ -9,23 +10,24 @@
#include <shaders/test.vert>
#include <shaders/test.frag>
const float raw_vertices[18] = {
// first triangle
0.5f, 0.5f, 0.0f, // top right
0.5f, 0.5f, 0.0f, // top right
0.5f, -0.5f, 0.0f, // bottom right
-0.5f, 0.5f, 0.0f, // top left
-0.5f, 0.5f, 0.0f, // top left
// second triangle
0.5f, -0.5f, 0.0f, // bottom right
-0.5f, -0.5f, 0.0f, // bottom left
-0.5f, 0.5f, 0.0f // top left
-0.5f, 0.5f, 0.0f // top left
};
float vertices[20] = {
// positions // texture coords
0.5f, 0.5f, 0.0f, 1.0f, 1.0f, // top right
0.5f, -0.5f, 0.0f, 1.0f, 0.0f, // bottom right
-0.5f, -0.5f, 0.0f, 0.0f, 0.0f, // bottom left
-0.5f, 0.5f, 0.0f, 0.0f, 1.0f // top left
0.5f, 0.5f, 0.0f, 1.0f, 1.0f, // top right
0.5f, -0.5f, 0.0f, 1.0f, 0.0f, // bottom right
-0.5f, -0.5f, 0.0f, 0.0f, 0.0f, // bottom left
-0.5f, 0.5f, 0.0f, 0.0f, 1.0f // top left
};
const unsigned int indices[6] = { // note that we start from 0!
0, 1, 3, // first triangle
@ -35,6 +37,34 @@ const unsigned int indices[6] = { // note that we start from 0!
blt::gfx::vertex_array* vao;
blt::gfx::shader_t* shader;
blt::gfx::texture_gl2D* texture;
blt::gfx::matrix_state_manager global_matrices;
float x = 0, y = 0, z = 0;
void handle_input()
{
using namespace blt::gfx;
float moveAtX = 0;
float moveAtZ = 0;
if (isKeyPressed(GLFW_KEY_W))
moveAtX = 1;
else if (isKeyPressed(GLFW_KEY_S))
moveAtX = -1;
else
moveAtX = 0;
if (isKeyPressed(GLFW_KEY_A))
moveAtZ = 1;
else if (isKeyPressed(GLFW_KEY_D))
moveAtZ = -1;
else
moveAtZ = 0;
const float speed = 270;
y -= static_cast<float>(moveAtX * speed * getFrameDeltaSeconds());
x += static_cast<float>(moveAtZ * speed * getFrameDeltaSeconds());
blt::mat4x4 view;
view.translate(x, y, z);
global_matrices.setView(view);
}
void init()
{
@ -60,24 +90,32 @@ void init()
texture_file file("../resources/textures/cumdollar.jpg");
texture = new texture_gl2D(file.texture());
global_matrices.create_internals();
}
void update(std::int32_t width, std::int32_t height)
{
global_matrices.update_perspectives(width, height);
ImGui::ShowDemoWindow();
ImGui::Text("%s among %d items", ICON_FA_FILE, 0);
ImGui::Button(ICON_FA_SEARCH " Search");
ImGui::SetNextWindowSize(ImVec2(150, 65));
ImGui::Begin("Debug Info Panel", nullptr, ImGuiWindowFlags_NoResize);
ImGui::Text("%s FPS: %f", ICON_FA_WRENCH, 1.0e9 / static_cast<double>(blt::gfx::getFrameDelta()));
ImGui::End();
handle_input();
global_matrices.update();
shader->bind();
blt::mat4x4 model;
model.translate((float) width / 2.0f, (float) height / 2.0f, 0.0f);
model.scale(500, 500, 1);
shader->setMatrix("model", model);
glActiveTexture(GL_TEXTURE0);
texture->bind();
vao->bind();
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
}
@ -87,6 +125,7 @@ int main()
delete vao;
delete shader;
delete texture;
global_matrices.cleanup();
blt::gfx::cleanup();
return 0;
}