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Request for OpenGL Assistance


maxpowa

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Hello fellow modders, my name is maxpowa and you may be familiar with the mods that I work on; TukMC and more recently, AdvancedHUD. I'm having issues drawing the outline of a rectangle, rather than filling it completely. I think, but I'm not sure if the issue is simply me failing to understand OpenGL and the Minecraft Tessellator.

 

What I currently have, which is failing to draw an unfilled rectangle:

    private static void drawOutlineRect(int x, int y, int x1, int y1, int color)
    {
        GL11.glPushMatrix();
        float f = (float)(color >> 24 & 255) / 255.0F;
        float f1 = (float)(color >> 16 & 255) / 255.0F;
        float f2 = (float)(color >> 8 & 255) / 255.0F;
        float f3 = (float)(color & 255) / 255.0F;
        Tessellator tessellator = Tessellator.instance;
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glDisable(GL11.GL_TEXTURE_2D);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glColor4f(f1, f2, f3, f);
        
        tessellator.startDrawing(GL11.GL_LINES);

        tessellator.addVertex((double)x, (double)y, 0.0D);   
        tessellator.addVertex((double)x1, (double)y, 0.0D);              
        tessellator.addVertex((double)x1, (double)y1, 0.0D);             
        tessellator.addVertex((double)x, (double)y1, 0.0D);
        tessellator.addVertex((double)x, (double)y, 0.0D);  

        tessellator.draw();

        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glDisable(GL11.GL_BLEND);
        GL11.glPopMatrix();
    }

 

Thanks in advance,

maxpowa

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So I changed it to not use the tessellator. Still doesn't work.

 

    private static void drawOutlineRect(int x, int y, int x1, int y1, int color)
    {
        GL11.glPushMatrix();
        float f = (float)(color >> 24 & 255) / 255.0F;
        float f1 = (float)(color >> 16 & 255) / 255.0F;
        float f2 = (float)(color >> 8 & 255) / 255.0F;
        float f3 = (float)(color & 255) / 255.0F;
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glDisable(GL11.GL_TEXTURE_2D);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glColor4f(f1, f2, f3, f);
        
        GL11.glBegin(GL11.GL_LINES);

        GL11.glVertex2d((double)x, (double)y);   
        GL11.glVertex2d((double)x1, (double)y);              
        GL11.glVertex2d((double)x1, (double)y1);             
        GL11.glVertex2d((double)x, (double)y1);
        GL11.glVertex2d((double)x, (double)y);  

        GL11.glEnd();

        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glDisable(GL11.GL_BLEND);
        GL11.glPopMatrix();
    }

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yeah btw... the tessellator calls opengl function for you. using the tessellator is using opengl...

whats happening when you draw this code? can you send a picture?

how to debug 101:http://www.minecraftforge.net/wiki/Debug_101

-hydroflame, author of the forge revolution-

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could you not just call drawVerticalLine(x, y1, y2, color) and drawHorizontalLine(x1, y, x2, color) to draw each edge individually? seems a lot more simple to me...

 

    private static void drawOutlineRect(int x, int y, int x1, int y1, int color)
    {
        this.drawHorizontalLine(x, y, x1, color);
        this.drawHorizontalLine(x, y1 ,x1,color);
        this.drawVerticalLine(x, y, y1, color);
        this.drawVerticalLine(x1, y, y1, color);
    }

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GottschCore-mc1.12.2-f14.23.5.2859-v1.15.1.jar        | None                                     |     | LC    | hardcorerevival    | 1.2.0                   | HardcoreRevival_1.12.2-1.2.0.jar                      | None                                     |     | LC    | waila              | 1.8.26                  | Hwyla-1.8.26-B41_1.12.2.jar                           | None                                     |     | LE    | imsm               | 1.12                    | Instant Massive Structures Mod 1.12.2.jar             | None                                     |     | L     | journeymap         | 1.12.2-5.7.1p2          | journeymap-1.12.2-5.7.1p2.jar                         | None                                     |     | L     | mobsunscreen       | @version@               | mobsunscreen-1.12.2-3.1.5.jar                         | None                                     |     | L     | morpheus           | 1.12.2-3.5.106          | Morpheus-1.12.2-3.5.106.jar                           | None                                     |     | L     | llibrary           | 1.7.20                  | llibrary-1.7.20-1.12.2.jar                            | None                                     |     | L     | mowziesmobs        | 1.5.8                   | mowziesmobs-1.5.8.jar                                 | None                                     |     | L     | nocubessrparmory   | 3.0.0                   | NoCubes_SRP_Combat_Addon_3.0.0.jar                    | None                                     |     | L     | nocubessrpnests    | 3.0.0                   | NoCubes_SRP_Nests_Addon_3.0.0.jar                     | None                                     |     | L     | nocubessrpsurvival | 3.0.0                   | NoCubes_SRP_Survival_Addon_3.0.0.jar                  | None                                     |     | L     | nocubesrptweaks    | V4.1                    | nocubesrptweaks-V4.1.jar                              | None                                     |     | L     | patchouli          | 1.0-23.6                | Patchouli-1.0-23.6.jar                                | None                                     |     | L     | artifacts          | 1.1.2                   | RLArtifacts-1.1.2.jar                                 | None                                     |     | L     | rsgauges           | 1.2.8                   | rsgauges-1.12.2-1.2.8.jar                             | None                                     |     | L     | rustic             | 1.1.7                   | rustic-1.1.7.jar                                      | None                                     |     | L     | silentlib          | 3.0.13                  | SilentLib-1.12.2-3.0.14+168.jar                       | None                                     |     | L     | scalinghealth      | 1.3.37                  | ScalingHealth-1.12.2-1.3.42+147.jar                   | None                                     |     | L     | lteleporters       | 1.12.2-3.0.2            | simpleteleporters-1.12.2-3.0.2.jar                    | None                                     |     | L     | spartanshields     | 1.5.5                   | SpartanShields-1.12.2-1.5.5.jar                       | None                                     |     | L     | spartanweaponry    | 1.5.3                   | SpartanWeaponry-1.12.2-1.5.3.jar                      | None                                     |     | L     | srparasites        | 1.9.18                  | SRParasites-1.12.2v1.9.18.jar                         | None                                     |     | L     | treasure2          | 2.2.0                   | Treasure2-mc1.12.2-f14.23.5.2859-v2.2.1.jar           | None                                     |     | L     | treeharvester      | 4.0                     | treeharvester_1.12.2-4.0.jar                          | None                                     |     | L     | twilightforest     | 3.11.1021               | twilightforest-1.12.2-3.11.1021-universal.jar         | None                                     |     | L     | variedcommodities  | 1.12.2                  | VariedCommodities_1.12.2-(31Mar23).jar                | None                                     |     | L     | voicechat          | 1.12.2-2.4.32           | voicechat-forge-1.12.2-2.4.32.jar                     | None                                     |     | L     | wolfarmor          | 3.8.0                   | WolfArmorAndStorage-1.12.2-3.8.0-universal-signed.jar | None                                     |     | L     | worldborder        | 2.3                     | worldborder_1.12.2-2.3.jar                            | None                                     |     | L     | midnight           | 0.3.5                   | themidnight-0.3.5.jar                                 | None                                     |     | L     | structurize        | 1.12.2-0.10.277-RELEASE | structurize-1.12.2-0.10.277-RELEASE.jar               | None                                     |     Loaded coremods (and transformers):  llibrary (llibrary-core-1.0.11-1.12.2.jar)   net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer   net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher WolfArmorCore (WolfArmorAndStorage-1.12.2-3.8.0-universal-signed.jar)    AstralCore (astralsorcery-1.12.2-1.10.27.jar)    CreativePatchingLoader (CreativeCore_v1.10.71_mc1.12.2.jar)    SecurityCraftLoadingPlugin ([1.12.2] SecurityCraft v1.9.8.jar)    ForgelinPlugin (Forgelin-1.8.4.jar)    midnight (themidnight-0.3.5.jar)   com.mushroom.midnight.core.transformer.MidnightClassTransformer FutureMC (Future-MC-0.2.19.jar)   thedarkcolour.futuremc.asm.CoreTransformer SpartanWeaponry-MixinLoader (SpartanWeaponry-1.12.2-1.5.3.jar)    Backpacked (backpacked-1.4.3-1.12.2.jar)   com.mrcrayfish.backpacked.asm.BackpackedTransformer LoadingPlugin (Reskillable-1.12.2-1.13.0.jar)   codersafterdark.reskillable.base.asm.ClassTransformer LoadingPlugin (Bloodmoon-MC1.12.2-1.5.3.jar)   lumien.bloodmoon.asm.ClassTransformer     Profiler Position: N/A (disabled)     Is Modded: Definitely; Server brand changed to 'fml,forge'     Type: Dedicated Server (map_server.txt)
    • When i add mods like falling leaves, visuality and kappas shaders, even if i restart Minecraft they dont show up in the mods menu and they dont work
    • Delete the forge-client.toml file in your config folder  
    • If you are using AMD/ATI, get the latest drivers from their website - do not update via system  
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