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Handmade Hero»Forums»Code»printing text is cumbersome... any advice for a better way to do it?
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printing text is cumbersome... any advice for a better way to do it?
1 month, 3 weeks ago Edited by C_Worm on May 25, 2020, 8:08 p.m. Reason: Initial post
Hey, so i've implemented a PrintText-system that prints text.
PrintText_Direct(): Prints a whole sentence at once.
PrintText_Delayed(): Prints a sentence one character at a time.

However, the way i've implemented this system makes the process of printing text a bit cumbersome and it goes like this:
----------------------------------------------------------------
1. define str_info
2. define str_entity
3. define str ( the acutal text string )
4. define strlen(str)

5. setup str_info ( position, color, print-delay count ) ( in gamecode.cpp )
6. PrintText_ Direct/Delayed ( in gamecode.cpp )
7. Update Vertices pos/col/texcoords with UpdateVertexArray_pos/col/texcoord() ( in platform.cpp )
8. Draw text DrawElements() ( in platform.cpp )
----------------------------------------------------------------

I can't think of a smoother system right now, but do you have any ideas on how to make it smoother, like get down the number of states in process, or are there like better ways to do this?

thanks,

I'll append src for
platform.cpp
gamecode.h
gamecode.cpp
gameDefines.h
-------------------------------------



gameDefines.h
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#define str_i_mainmenu 0
#define str_i_newgame 1
#define str_i_options 2
#define str_i_intro_01 3
#define str_i_intro_02 4
#define str_i_intro_03 5

// TEXT ENTITY INDICES
#define str_e_mainmenu 10100
#define str_e_newgame 10200
#define str_e_options 10300
#define str_e_intro_01 10400
#define str_e_intro_02 10500
#define str_e_intro_03 10600

// MENU STRING
#define str_mainmenu "Main Menu"
#define str_newgame "New Game"
#define str_options "Options WITH MANUYA EFPOKPOK"

// TEXT STRINGS
#define str_intro_01 "... ... ..."
#define str_intro_02 "what.. the... heck.. mmh... ?.."
#define str_intro_03 "... .. ."

i32 len_mainmenu = strlen(str_mainmenu);
i32 len_newgame = strlen(str_newgame);
i32 len_options = strlen(str_options);

i32 len_intro_01 = strlen(str_intro_01);
i32 len_intro_02 = strlen(str_intro_02);
i32 len_intro_03 = strlen(str_intro_03);

struct StringInfo
{
    float x;
    float y;
    V4f_COL col;
    char text[100];
    char delayedText[100];
    i32 currCharIndex;
    i32 delayCount;
    i32 delayFinish;
    bool delayInitialized;
    float strQuad_x;
    float strQuad_y;
    float strQuad_size_x;
    float strQuad_size_y;
    bool strQuad_pos_initialized = false;
    bool strQuad_size_initialized = false;
};


gamecode.h
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#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"

#define STB_TRUETYPE_IMPLEMENTATION
#include "stb_truetype.h"

#include "gameDefines.h"

#include "gamemath.h"

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <stdint.h>

typedef int8_t i8;
typedef int16_t i16;
typedef int32_t i32;
typedef int64_t i64;

typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;

#include "gameText.h"

struct GameState
{
    bool running;
    bool initializedEntities;
    V4f_COL clearColor;
    i32 currentState;
    i32 winWidth;
    i32 winHeight;
};

struct Time

{
    double currTime, fps, ms_per_frame, s_per_frame, timer, timerCountDown;
    bool started;
    char textBuffer[5];
};
struct MouseCoord
{
    double x, y;
};

struct Input
{
    
    bool keyPressed[1024];
    bool isPressed[1024];
    MouseCoord mouseCoord;
};

struct TextureInfo_Image
{
    i32 w, h, nChannels;
    u32 texture;
    unsigned char *bitmap;
};


struct TextureInfo_Font
{
    float pixelHeight;
    i32 bmWidth;
    i32 bmHeight;
    i32 fontBuffer_size;
    i32 bitmap_size;
    u32 texture;
    unsigned char *fontBuffer;
    unsigned char *bitmap;
    stbtt_bakedchar *bakedChar;
    
    void Free()
    {
        free(fontBuffer);
        free(bitmap);
    }
};

struct Entity
{
    V3f pos;
    V3f size;
    V4f_COL col;
    V2f texCoord;
    V2f texDimension;
    
    void Init(float _x, float _y, float _w, float _h)
    {
        pos.x = _x;
        pos.y = _y;
        pos.z = 0.0f;
        
        size.x = _w;
        size.y = _h;
        size.z = 0.0f;
        
        texCoord.x = 0.0f;
        texCoord.y = 0.0f;
        
        texDimension.x = 1.0f;
        texDimension.y = 1.0f;
    }
    
    void SetSolidColor(float _r, float _g, float _b, float _a)
    {
        col.r = _r;
        col.g = _g;
        col.b = _b;
        col.a = _a;
    }
    
    void SetTextureCoordsToFullMap()
    {
        texCoord.x = 0.0f;
        texCoord.y = 0.0f;
        texDimension.x = 1.0f;
        texDimension.y = 1.0f;
    }
};

#define UPDATEGAMECODE(name) extern "C" __declspec(dllexport) void name(GameState *gameState, Input *input, Time *time, Entity *entity, Vertex *vertex, TextureInfo_Font *ti_font, StringInfo *str_i)
UPDATEGAMECODE(UpdateGameCode);
typedef void (*PFNUPDATEGAMECODE)(GameState*, Input*, Time*, Entity*, Vertex*, TextureInfo_Font*, StringInfo*);


void RenderMainMenu(Entity *e, TextureInfo_Font *tif, GameState *gameState, Input *input, StringInfo *str_i);
void RenderOptionsMenu(Entity *e, TextureInfo_Font *tif, GameState *gameState, Input *input, StringInfo *str_i);
void RenderNewGameMenu(Entity *e, TextureInfo_Font *tif, GameState *gameState, Input *input, StringInfo *str_i);


void InitEntities(Entity *entity, TextureInfo_Font *ti_font, GameState *gameState, StringInfo *str_i);
void InitStringInfo(StringInfo *str_i, GameState *gameState);
void SetEntitiesPosToNULL(Entity *e, u32 start, u32 end);

void StartTimer(Time *t);

bool Collision_Entity_MouseCursor(Input *input, Entity *e, u32 min, u32 max);

void PrintText_Direct(char *text, StringInfo *str_i, Entity *e, TextureInfo_Font *ti_font);
void PrintText_Delayed(char *text, StringInfo *str_i, Entity *e, TextureInfo_Font *ti_font);

void UpdateVertexArray_Pos(Vertex *v, Entity *e, i32 min, i32 max);
void UpdateVertexArray_Col(Vertex *v, Entity *e, i32 min, i32 max);
void UpdateVertexArray_texCoord(Vertex *v, Entity *e, i32 min, i32 max);
void UpdateVertices_pos(Entity *e, Vertex *v);
void UpdateVertices_col(Entity *e, Vertex *v);
void UpdateVertices_texCoord(Entity *e, Vertex *v);


gamecode.cpp

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UPDATEGAMECODE(UpdateGameCode)
{
    
    InitStringInfo(str_i, gameState);
    
    if(!gameState->initializedEntities)
    {
        InitEntities(entity, &ti_font[times32], gameState, str_i);
        gameState->initializedEntities = true;
        
    }
    // Resest Initialization
    if(input->keyPressed['R'])
    {
        gameState->initializedEntities = false;
    }
    
    switch(gameState->currentState)
    {
        case MAINMENU:
        {
            gameState->clearColor = col4f(0.05f, 0.05f, 0.05f, 1.0f);
            RenderMainMenu(entity, ti_font, gameState, input, str_i);
            
            StartTimer(&time[1]);
            PrintText_Direct(time[1].textBuffer, &str_i[0], &entity[10], &ti_font[times32]); 
            
        }break;
        
        case NEWGAME:
        {
            SetEntitiesPosToNULL(entity, 10, 20);
            
            gameState->clearColor = col4f(0.2f, 0.0f, 0.1f, 1.0f);
            
            RenderNewGameMenu(entity, ti_font, gameState, input, str_i);
            
        }break;
        
        case OPTIONS:
        {
            gameState->clearColor = col4f(0.0f, 0.0f, 0.2f, 1.0f);
            RenderOptionsMenu(entity, ti_font, gameState, input, str_i);
            
        }break;
    }
    
    // Dont have to update col and texCoord every time, do it once in the init()
    
    
    for(int i = 0; i < 2; i++)
    {
        
        UpdateVertices_pos(&entity[i], &vertex[i * 4]);
        UpdateVertices_col(&entity[i], &vertex[i * 4]);
        UpdateVertices_texCoord(&entity[i], &vertex[i * 4]);
        
    }
    
    UpdateVertexArray_Pos(vertex, entity, str_e_mainmenu, str_e_options + len_options);
    UpdateVertexArray_Col(vertex, entity, str_e_mainmenu, str_e_options + len_options);
    UpdateVertexArray_texCoord(vertex, entity, str_e_mainmenu, str_e_options + len_options);
    
    UpdateVertexArray_Pos(vertex, entity, 10, 20);
    UpdateVertexArray_Col(vertex, entity, 10, 20);
    UpdateVertexArray_texCoord(vertex, entity, 10, 20);
    
    
    UpdateVertexArray_Pos(vertex, entity, str_e_intro_01, str_e_intro_01 + len_intro_01);
    UpdateVertexArray_Col(vertex, entity, str_e_intro_01, str_e_intro_01 + len_intro_01);
    UpdateVertexArray_texCoord(vertex, entity, str_e_intro_01, str_e_intro_01 + len_intro_01);
    
    UpdateVertexArray_Pos(vertex, entity, str_e_intro_02, str_e_intro_02 + len_intro_02);
    UpdateVertexArray_Col(vertex, entity, str_e_intro_02, str_e_intro_02 + len_intro_02);
    UpdateVertexArray_texCoord(vertex, entity, str_e_intro_02, str_e_intro_02 + len_intro_02);
    
    UpdateVertexArray_Pos(vertex, entity, str_e_intro_03, str_e_intro_03 + len_intro_03);
    UpdateVertexArray_Col(vertex, entity, str_e_intro_03, str_e_intro_03 + len_intro_03);
    UpdateVertexArray_texCoord(vertex, entity, str_e_intro_03, str_e_intro_03 + len_intro_03);
    
    
    
}

void RenderMainMenu(Entity *e, TextureInfo_Font *tif, GameState *gameState, Input *input, StringInfo *str_i)
{
    
    SetEntitiesPosToNULL(e, 0, 1);
    SetEntitiesPosToNULL(e, str_e_mainmenu, len_mainmenu);
    
    if(input->keyPressed[Esc])
    {
        
        if(!input->isPressed[Esc])
        {
            input->isPressed[Esc] = true;
            gameState->running = false;
        }
        
    }
    else
    {
        input->isPressed[Esc] = false;
    }
    
    PrintText_Direct(str_mainmenu, &str_i[str_i_mainmenu], &e[str_e_mainmenu], &tif[times128]);
    PrintText_Delayed(str_newgame, &str_i[str_i_newgame], &e[str_e_newgame], &tif[times32]);
    PrintText_Delayed(str_options, &str_i[str_i_options], &e[str_e_options], &tif[times32]);
    
    if(Collision_Entity_MouseCursor(input, e, str_e_newgame, str_e_newgame + len_newgame))
    {
        
        if(input->keyPressed[MOUSE_L])
        {
            gameState->currentState = NEWGAME;
            
        }
        printf("state: %d", gameState->currentState);
        for(i32 i = str_e_newgame; i < str_e_newgame +  len_newgame; i++)
        {
            e[i].SetSolidColor(1.0f, 0.0f, 0.0f, 1.0f);
        }
        
    }
    
    if(Collision_Entity_MouseCursor(input, e, str_e_options, str_e_options + len_options))
    {
        
        if(input->keyPressed[MOUSE_L])
        {
            gameState->currentState = OPTIONS;
            
        }
        printf("state: %d", gameState->currentState);
        for(i32 i = str_e_options; i < str_e_options +  len_options; i++)
        {
            e[i].SetSolidColor(1.0f, 0.0f, 0.0f, 1.0f);
        }
        
    }
    
}

void RenderNewGameMenu(Entity *e, TextureInfo_Font *tif, GameState *gameState, Input *input, StringInfo *str_i)
{
    str_i[str_i_options].currCharIndex = 0;
    str_i[str_i_newgame].currCharIndex = 0;
    
    SetEntitiesPosToNULL(e, 0, 1);
    SetEntitiesPosToNULL(e, str_e_mainmenu, str_e_options + len_options);
    
    if(input->keyPressed[Esc])
    {
        
        if(!input->isPressed[Esc])
        {
            input->isPressed[Esc] = true;
            gameState->currentState = MAINMENU;
        }
        
    }
    else
    {
        input->isPressed[Esc] = false;
    }
    
    
    PrintText_Delayed(str_intro_01, &str_i[str_i_intro_01], &e[str_e_intro_01], &tif[times32]);  
    
    if((str_i[str_i_intro_01].currCharIndex) == len_intro_01)
    {
        static i32 pause = 0;
        if(pause == 60)
        {
            PrintText_Delayed(str_intro_02, &str_i[str_i_intro_02], &e[str_e_intro_02], &tif[times32]);  
        }
        else if(pause < 61)
        {
            pause++;
        }
    }
    PrintText_Delayed(str_intro_03, &str_i[str_i_intro_03], &e[str_e_intro_03], &tif[times32]);  
    
}

void RenderOptionsMenu(Entity *e, TextureInfo_Font *tif, GameState *gameState, Input *input, StringInfo *str_i)
{
    str_i[NEWGAME].currCharIndex = 0;
    str_i[OPTIONS].currCharIndex = 0;
    
    if(input->keyPressed[Esc])
    {
        
        if(!input->isPressed[Esc])
        {
            input->isPressed[Esc] = true;
            gameState->currentState = MAINMENU;
        }
        
    }
    else
    {
        input->isPressed[Esc] = false;
    }
    
    SetEntitiesPosToNULL(e, 0, 1);
    SetEntitiesPosToNULL(e, str_e_mainmenu, str_e_options + len_options);
    
    e[0].Init(200.0f, 300.0f, 800.0f, 800.0f);
    e[0].SetSolidColor(1.0f, 1.0f, .0f, 1.0f);
    e[0].SetTextureCoordsToFullMap();
    
    e[1].Init(700.0f, 200.0f, 900.0f, 900.0f);
    e[1].SetSolidColor(1.0f, 1.0f, 1.0f, 1.0f);
    e[1].SetTextureCoordsToFullMap();
    
    PrintText_Direct("NEWGAME", &str_i[MAINMENU], &e[2], &tif[times32]);
    
}

void InitEntities(Entity *entity, TextureInfo_Font *ti_font, GameState *gameState, StringInfo *str_i)
{
    
}
void InitStringInfo(StringInfo *str_i, GameState *gameState)
{
    str_i[str_i_mainmenu].x = gameState->winWidth/2.0f - 150.0f;
    str_i[str_i_mainmenu].y = 150.0f;
    str_i[str_i_mainmenu].col = col4f(0.0f, 1.0f, 0.0f, 1.0f);;
    
    str_i[str_i_newgame].x = gameState->winWidth/2.0f - 150.0f;
    str_i[str_i_newgame].y = 190.0f;
    str_i[str_i_newgame].col = col4f(0.0f, 1.0f, 0.0f, 1.0f);;
    if(!str_i[str_i_newgame].delayInitialized)
    {
        str_i[str_i_newgame].delayInitialized = true;
        str_i[str_i_newgame].delayCount = 10;
        str_i[str_i_newgame].delayFinish = 10;
    }
    
    str_i[str_i_options].x = gameState->winWidth/2.0f - 150.0f;
    str_i[str_i_options].y = 230.0f;
    str_i[str_i_options].col = col4f(0.0f, 1.0f, 0.0f, 1.0f);;
    if(!str_i[str_i_options].delayInitialized)
    {
        str_i[str_i_options].delayInitialized = true;
        str_i[str_i_options].delayCount = 30;
        str_i[str_i_options].delayFinish = 30;
    }
    
    str_i[str_i_intro_01].x = gameState->winWidth/2.0f - 150.0f;
    str_i[str_i_intro_01].y = 230.0f;
    str_i[str_i_intro_01].col = col4f(0.0f, 1.0f, 0.0f, 1.0f);;
    if(!str_i[str_i_intro_01].delayInitialized)
    {
        str_i[str_i_intro_01].delayInitialized = true;
        str_i[str_i_intro_01].delayCount = 10;
        str_i[str_i_intro_01].delayFinish = 10;
    }
    
    str_i[str_i_intro_02].x = gameState->winWidth/2.0f - 150.0f;
    str_i[str_i_intro_02].y = 260.0f;
    str_i[str_i_intro_02].col = col4f(0.0f, 1.0f, 0.0f, 1.0f);;
    if(!str_i[str_i_intro_02].delayInitialized)
    {
        str_i[str_i_intro_02].delayInitialized = true;
        str_i[str_i_intro_02].delayCount = 10;
        str_i[str_i_intro_02].delayFinish = 10;
    }
    
    str_i[str_i_intro_03].x = gameState->winWidth/2.0f - 150.0f;
    str_i[str_i_intro_03].y = 290.0f;
    str_i[str_i_intro_03].col = col4f(0.0f, 1.0f, 0.0f, 1.0f);;
    if(!str_i[str_i_intro_03].delayInitialized)
    {
        str_i[str_i_intro_03].delayInitialized = true;
        str_i[str_i_intro_03].delayCount = 100;
        str_i[str_i_intro_03].delayFinish = 100;
    }
    
}

void SetEntitiesPosToNULL(Entity *e, u32 start, u32 end)
{
    for(u32 i = start; i <= end; i++)
    {
        e[i].pos.x = 0;
        e[i].pos.y = 0;
        e[i].size.x = 0;
        e[i].size.y = 0;
    }
}

void StartTimer(Time *t)
{
    if(!t->started)
    {
        t->started = true;
        t->currTime = t->timer;
    }
    if(t->currTime <= 0.0f)
    {
        t->currTime = t->timer;
    }
    
    sprintf(t->textBuffer, "%d", (int)t->currTime);
}

bool Collision_Entity_MouseCursor(Input *input, Entity *e, u32 min, u32 max)
{
    if (min > max)
    {
        printf("Collision_Entity_MouseCursor(): min > max\n");
        return false;
    }
    else
    {
        for(u32 i = min; i <= max; i++)
        {
            if(input->mouseCoord.x >= e[i].pos.x &&
               input->mouseCoord.x <= e[i].pos.x + e[i].size.x &&
               input->mouseCoord.y >= e[i].pos.y &&
               input->mouseCoord.y <= e[i].pos.y + e[i].size.y)
            {
                return true;
            }
        }
    }
    
    return false;
    
}


void PrintText_Direct(char *text, StringInfo *str_i, Entity *e, TextureInfo_Font *ti_font)
{
    
    stbtt_aligned_quad q = {};
    
    for(int i = 0; *text; i++, text++)
    {
        
        stbtt_GetBakedQuad(ti_font->bakedChar, ti_font->bmWidth, ti_font->bmHeight, *text - 32, &str_i->x, &str_i->y, &q, 1);
        if(!str_i->strQuad_pos_initialized)
        {
            str_i->strQuad_pos_initialized = true;
            str_i->strQuad_x = q.x0;
            str_i->strQuad_y = q.y0;
            str_i->strQuad_size_y = q.y1 - q.y0;
        }
        
        e[i].pos.x = q.x0;
        e[i].pos.y = q.y0;
        // subract x0 and y0 because it's added in UpdateVertices()
        e[i].size.x = q.x1 - q.x0;
        e[i].size.y = q.y1 - q.y0;
        
        e[i].texCoord.x = q.s0;
        e[i].texCoord.y = q.t0;
        // subract s0 and t0 because it's added in UpdateVertices()
        e[i].texDimension.x = q.s1 - q.s0;
        e[i].texDimension.y = q.t1 - q.t0;
        
        e[i].SetSolidColor(str_i->col.r, str_i->col.g, str_i->col.b, str_i->col.a);
    }
    
    if(!str_i->strQuad_size_initialized)
    {
        str_i->strQuad_size_initialized = true;
        str_i->strQuad_size_x = q.x1 - str_i->strQuad_x;
    }
    
}

void PrintText_Delayed(char *text, StringInfo *str_i, Entity *e, TextureInfo_Font *ti_font)
{
    if(str_i->delayCount == str_i->delayFinish)
    {
        
        
        if(str_i->currCharIndex < strlen(text))
        {
            
            str_i->delayedText[str_i->currCharIndex] = text[str_i->currCharIndex];
            
            for(int i = 0; i <= str_i->currCharIndex; i++)
            {
                stbtt_aligned_quad q = {};
                stbtt_GetBakedQuad(ti_font->bakedChar, ti_font->bmWidth, ti_font->bmHeight, str_i->delayedText[i] - 32, &str_i->x, &str_i->y, &q, 1);
                
                e[i].pos.x = q.x0;
                e[i].pos.y = q.y0;
                // subract x0 and y0 because it's added in UpdateVertices()
                e[i].size.x = q.x1 - q.x0;
                e[i].size.y = q.y1 - q.y0;
                
                e[i].texCoord.x = q.s0;
                e[i].texCoord.y = q.t0;
                // subract s0 and t0 because it's added in UpdateVertices()
                e[i].texDimension.x = q.s1 - q.s0;
                e[i].texDimension.y = q.t1 - q.t0;
                
                
            }
            
            str_i->delayCount = 0;
            str_i->currCharIndex++;
        }
        
    }
    else
    {
        str_i->delayCount++;
    }
    
    for(i32 i = 0; i < strlen(text); i++)
    {
        e[i].SetSolidColor(str_i->col.r, str_i->col.g, str_i->col.b, str_i->col.a);
    }
}


void UpdateVertexArray_Pos(Vertex *v, Entity *e, i32 min, i32 max)
{
    
    for(i32 i = min; i <= max; i++)
    {
        // &v[i * 4],  4 is for every 4th vertex in a quad
        UpdateVertices_pos(&e[i], &v[i * 4]);
    }
    
}

void UpdateVertexArray_Col(Vertex *v, Entity *e, i32 min, i32 max)
{
    
    for(i32 i = min; i <= max; i++)
    {
        // &v[i * 4],  4 is for every 4th vertex in a quad
        UpdateVertices_col(&e[i], &v[i * 4]);
    }
    
}

void UpdateVertexArray_texCoord(Vertex *v, Entity *e, i32 min, i32 max)
{
    
    for(i32 i = min; i <= max; i++)
    {
        // &v[i * 4],  4 is for every 4th vertex in a quad
        UpdateVertices_texCoord(&e[i], &v[i * 4]);
    }
    
}

void UpdateVertices_pos(Entity *e, Vertex *v)
{
    v[0].pos.x = e->pos.x;
    v[0].pos.y = e->pos.y;
    
    v[1].pos.x = e->pos.x;
    v[1].pos.y = e->pos.y + e->size.y;
    
    v[2].pos.x = e->pos.x + e->size.x;
    v[2].pos.y = e->pos.y;
    
    v[3].pos.x = e->pos.x + e->size.x;
    v[3].pos.y = e->pos.y + e->size.y;
}

void UpdateVertices_col(Entity *e, Vertex *v)
{
    v[0].col.r = e->col.r;
    v[0].col.g = e->col.g;
    v[0].col.b = e->col.b;
    v[0].col.a = e->col.a;
    
    v[1].col.r = e->col.r;
    v[1].col.g = e->col.g;
    v[1].col.b = e->col.b;
    v[1].col.a = e->col.a;
    
    v[2].col.r = e->col.r;
    v[2].col.g = e->col.g;
    v[2].col.b = e->col.b;
    v[2].col.a = e->col.a;
    
    v[3].col.r = e->col.r;
    v[3].col.g = e->col.g;
    v[3].col.b = e->col.b;
    v[3].col.a = e->col.a;
}

void UpdateVertices_texCoord(Entity *e, Vertex *v)
{
    v[0].texCoord.x = e->texCoord.x;
    v[0].texCoord.y = e->texCoord.y;
    
    v[1].texCoord.x = e->texCoord.x;
    v[1].texCoord.y = e->texCoord.y + e->texDimension.y;
    
    v[2].texCoord.x = e->texCoord.x + e->texDimension.x;
    v[2].texCoord.y = e->texCoord.y;
    
    v[3].texCoord.x = e->texCoord.x + e->texDimension.x;
    v[3].texCoord.y = e->texCoord.y + e->texDimension.y;
}


platform.h
1




platform.cpp

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#include "include\openGL.h"
#include "include\gamecode.h"
#include "include\platform.h"



int main()
{
    srand(time(0));
    
    GLFWwindow *hWindow = InitializeGLFWandGLAD(1920, 1080, "Project", windowed);
    
    GameState gameState = {};
    Input input = {};
    Time time[10] = {};
    WindowDimension winDim = {};
    Entity entity[MAX_ENTITIES] = {};
    Vertex vertices[MAX_ENTITIES * 4] = {};
    TextureInfo_Image ti_image[10] = {};
    TextureInfo_Font ti_font[10] = {};
    StringInfo str_i[100] = {};
    GameCodeDLL gameCode = {};
    LoadGameCode(&gameCode);
    
    gameState.running = true;
    gameState.initializedEntities = false;
    gameState.currentState = MAINMENU;
    
    
    // Load Shaderprograms
    u32 shaderProgram_Texture = LoadShaderProgram("shader\\VS.glsl", "shader\\FS_Texture.glsl");
    u32 shaderProgram_SolidColor = LoadShaderProgram("shader\\VS.glsl", "shader\\FS_SolidColor.glsl");
    u32 shaderProgram_Font = LoadShaderProgram("shader\\VS.glsl", "shader\\FS_Font.glsl");
    
    // Uniform Locations
    u32 uniform_SolidColor_windowDimensions = glGetUniformLocation(shaderProgram_SolidColor, "windowDimensions");
    u32 uniform_Texture_windowDimensions = glGetUniformLocation(shaderProgram_Texture, "windowDimensions");
    u32 uniform_Font_windowDimensions = glGetUniformLocation(shaderProgram_Font, "windowDimensions");
    
    u32 VAO;
    u32 VBO;
    u32 IBO;
    u32 colAttribOffset = sizeof(V3f);
    u32 texCoordAttribOffset = colAttribOffset + sizeof(V4f_COL);
    u32 MaxMemory = sizeof(float) * TOTAL_AMOUNT_ATTRIBS;
    u32 vtxIndices[MAX_ENTITIES * 6] = {};
    
    for(int i = 0; i < MAX_ENTITIES; i++)
    {
        vtxIndices[(i * 6) + 0] = (i * 4) + 0;
        vtxIndices[(i * 6) + 1] = (i * 4) + 1;
        vtxIndices[(i * 6) + 2] = (i * 4) + 2;
        vtxIndices[(i * 6) + 3] = (i * 4) + 1;
        vtxIndices[(i * 6) + 4] = (i * 4) + 2;
        vtxIndices[(i * 6) + 5] = (i * 4) + 3;
    }
    
    glGenVertexArrays(1, &VAO);
    glGenBuffers(1, &VBO);
    glGenBuffers(1, &IBO);
    GenTextures_Font(ARRAYSIZE(ti_font), ti_font);
    GenTextures_Image(ARRAYSIZE(ti_image), ti_image);
    
    glBindVertexArray(VAO);
    
    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER, MaxMemory, 0, GL_DYNAMIC_DRAW);
    
    glEnableVertexAttribArray(0);
    glVertexAttribPointer(0, 3, GL_FLOAT, false, sizeof(Vertex), (void*)0);
    
    glEnableVertexAttribArray(1);
    glVertexAttribPointer(1, 4, GL_FLOAT, false, sizeof(Vertex), (void*)colAttribOffset);
    
    glEnableVertexAttribArray(2);
    glVertexAttribPointer(2, 2, GL_FLOAT, false, sizeof(Vertex), (void*)texCoordAttribOffset);
    
    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO);
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(vtxIndices), vtxIndices, GL_STATIC_DRAW);
    
    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    
    //SETUP FONTS
    SetupFonts(ti_font);
    
    //SETUP IMAGES
    SetupImages(ti_image);
    
    // FREE ALL IMAGE BITMAP DATA with FreeImage(TextureInfo_Image *tif);
    FreeImage(&ti_image[myPng]);
    FreeImage(&ti_image[devastator]);
    
    FindFirstFile("gamecode.dll", &gameCode.findData);
    FILETIME lastWriteTime = gameCode.findData.ftLastWriteTime;
    
    time[0].fps = 0;
    time[0].ms_per_frame = 0;
    SetupTimer(&time[1], 10.0f);
    
    while(gameState.running && !glfwWindowShouldClose(hWindow))
    {
        time[0].ms_per_frame = 1000 * (glfwGetTime() - time[0].currTime);
        time[0].fps = 1.0f / ( time[0].ms_per_frame / 1000.0f);
        time[0].currTime = glfwGetTime();
        
        // update timer
        time[1].currTime -= (glfwGetTime() - time[1].timerCountDown);
        time[1].timerCountDown = glfwGetTime(); 
        
        glfwGetWindowSize(hWindow, &winDim.width, &winDim.height);
        glfwGetCursorPos(hWindow, &input.mouseCoord.x, &input.mouseCoord.y);
        gameState.winWidth = winDim.width;
        gameState.winHeight = winDim.height;
        glViewport(0, 0, winDim.width, winDim.height);
        
        glUseProgram(shaderProgram_SolidColor);
        glUniform2f(uniform_SolidColor_windowDimensions, (float)winDim.width, (float)winDim.height);
        glUseProgram(shaderProgram_Texture);
        glUniform2f(uniform_Texture_windowDimensions, (float)winDim.width, (float)winDim.height);
        glUseProgram(shaderProgram_Font);
        glUniform2f(uniform_Font_windowDimensions, (float)winDim.width, (float)winDim.height);
        
        CheckInput(hWindow, &input);
        
        FindFirstFile("gamecode.dll", &gameCode.findData);
        if(CompareFileTime(&lastWriteTime, &gameCode.findData.ftLastWriteTime) != 0)
        {
            
            // LOADING GAMECODE
            UnloadGameCode(&gameCode);
            LoadGameCode(&gameCode);
            // UNLOADING GAMECODE
            
            lastWriteTime = gameCode.findData.ftLastWriteTime;
        }
        
        
        glClearColor(gameState.clearColor.r, gameState.clearColor.g, gameState.clearColor.b, gameState.clearColor.a);
        glClear(GL_COLOR_BUFFER_BIT);
        
        gameCode.UpdateGameCode(&gameState, &input, time, entity, vertices, ti_font, str_i);
        
        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
        
        u32 indexOffset = 6 * sizeof(u32);
        //RenderImages
        
        
        //Render Text
        glUseProgram(shaderProgram_Texture);
        BindTexture2D(ti_image[myPng].texture);
        glDrawElements(GL_TRIANGLES, 2 * 6, GL_UNSIGNED_INT, (u32*)(0 * indexOffset));
        
        
        glUseProgram(shaderProgram_Font);
        
        BindTexture2D(ti_font[times128].texture);
        glDrawElements(GL_TRIANGLES, len_mainmenu * 6, GL_UNSIGNED_INT, (u32*)(str_e_mainmenu * indexOffset));
        
        BindTexture2D(ti_font[times32].texture);
        glDrawElements(GL_TRIANGLES, len_newgame * 6, GL_UNSIGNED_INT, (u32*)(str_e_newgame * indexOffset));
        glDrawElements(GL_TRIANGLES, len_options * 6, GL_UNSIGNED_INT, (u32*)(str_e_options * indexOffset));
        
        glDrawElements(GL_TRIANGLES, len_intro_01 * 6, GL_UNSIGNED_INT, (u32*)(str_e_intro_01 * indexOffset));
        glDrawElements(GL_TRIANGLES, len_intro_02 * 6, GL_UNSIGNED_INT, (u32*)(str_e_intro_02 * indexOffset));
        glDrawElements(GL_TRIANGLES, len_intro_03 * 6, GL_UNSIGNED_INT, (u32*)(str_e_intro_03 * indexOffset));
        
        glDrawElements(GL_TRIANGLES, 5 * 6, GL_UNSIGNED_INT, (u32*)(10 * indexOffset));
        glfwSwapBuffers(hWindow);
        glfwPollEvents();
        
    }
    
    glDeleteProgram(shaderProgram_SolidColor);
    DeleteTextures_Font(ARRAYSIZE(ti_font), ti_font);
    DeleteTextures_Image(ARRAYSIZE(ti_image), ti_image);
    glDeleteBuffers(1, &VBO);
    glDeleteBuffers(1, &IBO);
    glDeleteVertexArrays(1, &VAO);
    
    
    
    return 0;
    
}
Simon Anciaux
828 posts
printing text is cumbersome... any advice for a better way to do it?
1 month, 3 weeks ago
Try to write the api you would like to use ("Write the usage code first") and than make the system that will support that (or the closest thing to your desired api).

A few notes:
- You can define a string structure to make it a little easier:
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typedef struct string_t {
    u8* bytes;
    u32 used;
    u32 capacity;
} string_t;

/* Using this macro to set the size, and capacity. Capacity contains the null terminator. */
#define string_from_literal( literal ) { ( literal ), sizeof( literal ) - 1, sizeof( literal ) }

/* Direct */
string_t string = string_from_literal( "Hello Dave." );
display_string( string, x, y, color... );

/* Delayed */
string_t string = string_from_literal( "Hello Dave." );
string.size = 1;

if ( timer_tick( timer ) && string.size < string.capacity - 1 ) {
    string.size++;
}

display_string( string, x, y, color... );

- As shown in the example you can use the same function to display text "direct" and "delayed", you just change the size of the string.
- display_string is a function that would add an item in a command buffer for rendering. Your rendering system would use all the commands to render, that way the game code doesn't have to know how the rendering is happening (not handling vertex buffer, attributes... itself).
- str_info would be one type of command in the command buffer, other would be commands to draw quad, lines, triangles, models...
- display_string would allocate a command (pushing it in the command buffer) and fill the str_info structure.

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/* Pseudo code*/
int main( void ) {
     while ( running ) {
          /* game code */
          display_string( command_buffer, ... );
          display_rectangle( command_buffer, ... );
          ...

          /* rendering */
          while ( command_buffer_not_empty ) {
              command = get_next_command( command_buffer );
              if ( command.type == string_command ) {
                  opengl_things_to_render_the_string( );
              } else if ( command.type == rectangle_command ) {
                  opengl_things_to_render_a_rectangle( );
              } else if ( ... ) {
                  ...
              }
          }
     }
}