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PODisplaying texture in spritesheet based on ID's
 

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  1. PODisplaying texture in spritesheet based on ID's
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    <p>I've been trying to display blocks on screen, each with different textures. I've got the spritesheet set up as well as the code. But I can't manage to get specific coordinates in the spritesheet, I can't display anything else as the first image.</p> <p>I've got this render function set up:</p> <pre><code>public static void render(int texture, int blockID) { float xPos = (float)blockID; float yPos = 0; while(xPos &gt; 9) { xPos -= 10; yPos++; } glBindTexture(GL_TEXTURE_2D, texture); glPushMatrix(); glBegin(GL_TRIANGLES); glTexCoord2f((8f / 160f) * xPos, (8f / 160f) * yPos); glVertex2i(16, 0); glTexCoord2f((8f / 160f) * xPos, (8f / 160f) * yPos); glVertex2i(0, 0); glTexCoord2f((8f / 160f) * xPos, (8f / 160f) * yPos); glVertex2i(0, 16); glTexCoord2f((8f / 160f) * xPos, (8f / 160f) * yPos); glVertex2i(0, 16); glTexCoord2f((8f / 160f) * xPos, (8f / 160f) * yPos); glVertex2i(16, 16); glTexCoord2f((8f / 160f) * xPos, (8f / 160f) * yPos); glVertex2i(16, 0); glEnd(); glPopMatrix(); } </code></pre> <p>It decides which texture to take from the blockID, so if the blockID is 1 it takes the second image from the spritesheet, if it's 2 it takes the third image, etc.</p> <p>But I don't know where I have to multiply the xPos and yPos variables to the glTexCoord2f. I've tried different ways like:</p> <pre><code>glTexCoord2f(xPos / 128f, 0f / 128f); glVertex2i(16, 0); glTexCoord2f(0f / 128f, yPos / 128f); glVertex2i(0, 16); </code></pre> <p>or</p> <pre><code>glTexCoord2f((0f / 128f) * xPos, 0f / 128f; glVertex2i(16, 0); glTexCoord2f(0f / 128f, (8f / 128f)) * yPos; glVertex2i(0, 16); </code></pre> <p>and even</p> <pre><code>glTexCoord2f(0f / 128f, 0f / 128f); glVertex2i(16 * xPos, 0); glTexCoord2f(0f / 128f, 8f / 128f); glVertex2i(0, 16 * yPos); </code></pre> <p>But none worked.</p> <p><strong>=== EDIT ===</strong></p> <p>I've almost managed to get it working. But only with odd blockID's. If the blockID is 1 it displays the first texture, but if it's 2 it displays a brownish color (that isn't on my spritesheet) and if the blockID is 3 it displays the second texture on the sheet etc.</p>
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