How to embed gl-function in raylib framwork?why the following program can not get the dash line?

[aliule2020]

#define APIENTRY __stdcall
#define WINGDIAPI __declspec(dllimport)

#include "raylib.h"
#include "imgui.h"
#include "imgui_impl_opengl3.h"
#include "imgui_impl_raylib.h"
#include <gl/GL.h>
#include "rlgl.h"

void DrawDash(int sx,int sy,int ex,int ey,Color co)
{ // Reset current matrix (MODELVIEW)

//glLineStipple(1, 0x0101);

rlDrawRenderBatchActive();
rlBegin(RL_LINES);
rlColor4f(co.r, co.g, co.b, co.a);
rlVertex2f(sx, sy);
rlVertex2f(ex, ey);
rlEnd();

}

int main(int argc, char* argv[])
{
int screenWidth = 1024;
int screenHeight = 768;

InitWindow(screenWidth, screenHeight, "raylib-imgui");
SetWindowState(FLAG_WINDOW_RESIZABLE);

SetTargetFPS(60);

ImGui::CreateContext();
ImGui::StyleColorsDark();

ImGui_ImplOpenGL3_Init();
ImGui_ImplRaylib_Init();



while (!WindowShouldClose())
{
    ImGui_ImplOpenGL3_NewFrame();
    ImGui_ImplRaylib_NewFrame();
    ImGui::NewFrame();
    ImGui_ImplRaylib_ProcessEvent();

    
    BeginDrawing();

    {
        ClearBackground(RAYWHITE);
      
        DrawCircle(100, 100, 50,RED);

        **DrawDash(200, 200, 350, 350, BLUE);**    //here it dosen't work


        ImGui::ShowDemoWindow();

        ImGui::Render();
        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
    }

    EndDrawing();
}

ImGui_ImplRaylib_Shutdown();
ImGui_ImplOpenGL3_Shutdown();

CloseWindow();

return 0;

}

[raysan5]

@aliule2020 Here it is an example of OpenGL interoperativility: https://github.com/raysan5/raylib/blob/master/examples/others/raylib_opengl_interop.c

But I'm afraid glLineStipple() was deprecated in OpenGL 3.1, you should recompile raylib for OpenGL 2.1 or OpenGL 1.1.

[aliule2020]

Thank you

#include "raylib.h"
#include "rlgl.h"

void DrawDash(float sx,float sy,float ex,float ey,int segnum,float segratio, Color color, float width)
{
float mx;
float my;
float lenx = (ex - sx) / segnum;
float leny = (ey - sy) / segnum;
mx = sx;
my = sy;

rlBegin(RL_LINES);
rlSetLineWidth(width);
for (int i = 0; i < segnum; i++)
{
    rlColor4ub (color.r, color.g, color.b, color.a); 
    rlVertex3f(mx, my, 0);

    rlColor4ub(~color.r, ~color.g, ~color.b, color.a);
    rlVertex3f(mx + lenx * segratio, my + leny * segratio, 0);

    mx = mx + lenx;
    my = my + leny;
}
rlEnd();

}

int main()
{
const int screenWidth = 800;
const int screenHeight = 800;
InitWindow(screenWidth, screenHeight, "raylib DashLine");

while (!WindowShouldClose())
{
    BeginDrawing();
    ClearBackground(RAYWHITE);

       DrawDash(100, 100, 600, 600, 20, 0.5, Color{ 0 , 255 ,0 ,255 }, 10);

    EndDrawing();
}

CloseWindow();

}

In raylib4.2, work very well.