Posted December 26, 201410 yr Hello everyone, i need to draw picture on screen and make it a bit larger. I am doing this code: @ForgeSubscribe public void onGuiRendering(RenderGameOverlayEvent.Post event) { this.width = event.resolution.getScaledWidth(); this.height = event.resolution.getScaledHeight(); if(event.type == ElementType.ALL) { GL11.glPushMatrix(); GL11.glPushAttrib(GL11.GL_ENABLE_BIT); GL11.glEnable(GL11.GL_ALPHA_TEST); GL11.glAlphaFunc(GL11.GL_GREATER, 0.1F); GL11.glScalef(1.7F, 1.7F,1.7F); //pic goes here GL11.glPopAttrib(); GL11.glPopMatrix(); } } My problem is in glScalef(), after this method picture move away from the position which i am rendering it on. How to return it?
December 26, 201410 yr Hi Try GL11.glTranslatef(deltaX, deltaY, deltaZ); You should be able to figure out the correct values with a couple of trial and error. In general you need to combine scaling and translation to make sure that your shape scales around the correct centrepoint. This image illustrates the problem when doing a rotation, the concept is the same for scaling. http://www.glprogramming.com/red/images/Image52.gif For more info see here http://www.glprogramming.com/red/chapter03.html -TGG
December 26, 201410 yr Author I still dont understood how to do this, i tried to do in sush way @ForgeSubscribe public void onGuiRendering(RenderGameOverlayEvent.Post event) { this.width = event.resolution.getScaledWidth(); this.height = event.resolution.getScaledHeight(); if(event.type == ElementType.ALL) { GL11.glPushMatrix(); GL11.glPushAttrib(GL11.GL_ENABLE_BIT); GL11.glEnable(GL11.GL_ALPHA_TEST); GL11.glAlphaFunc(GL11.GL_GREATER, 0.1F); GL11.glScalef(1.7F, 1.7F,1.7F); GL11.glTranslated(1.7F, 1.7F, 1.7F); ri.renderItemIntoGUI(mc.fontRenderer, mc.getTextureManager(), new ItemStack(Item.pocketSundial), (int) ((int) (this.width / 2 ) / 1.7F), 100); GL11.glPopAttrib(); GL11.glPopMatrix(); } } But it still not in the middle of x-axis
December 26, 201410 yr It seems like you are trying to draw a 2D image. You shouldn't have to bother with z coordinates then. That is, when you're calling glScalef , you should use 1 for the z-scale: GL11.glScalef(x, y, 1); Similarly, you also want to ignore the z-axis when you're translating too (if you still need to translate): GL11.glTranslatef(x, y, 0); GitHub|Recipe API Proposal
December 26, 201410 yr Also, update to 1.7.10 or 1.8. 1.6.4 is severely outdated. Check out my mod, Realms of Chaos, here. If I helped you, be sure to press the "Thank You" button!
December 26, 201410 yr > GL11.glTranslated(1.7F, 1.7F, 1.7F); But it still not in the middle of x-axis then try other values until it looks right... For example GL11.glTranslated(10, 0, 0); then change it to GL11.glTranslated(100,0,0); then change it to GL11.glTranslated(-50,0,0); etc eventually you will find the value of deltax which translates the image to the correct location. -TGG
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