Call renderer on tiles only-if tile on screen
OpenGL automatically clips objects outside of the view space but we were still using up a lot of useless glDraw calls which impacts performance. This change is temporary and will change when we get to scrolling the world.
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@ -306,18 +306,22 @@ void worldTraveller_gameUpdateAndRender(GameState *state, const f32 dt)
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TexAtlas *worldAtlas = asset_getTextureAtlas(world->texType);
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Texture *worldTex = asset_getTexture(world->texType);
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f32 ndcFactor = 1.0f / CAST(f32)worldTex->width;
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f32 ndcFactor = 1.0f / CAST(f32) worldTex->width;
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for (i32 i = 0; i < ARRAY_COUNT(world->tiles); i++)
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{
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Tile tile = world->tiles[i];
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v2 tileSize = V2(CAST(f32)state->tileSize, CAST(f32)state->tileSize);
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v2 tilePosInPixel = v2_scale(tile.pos, tileSize.x);
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v4 texNDC =
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v4_scale(worldAtlas->texRect[terraincoords_ground], ndcFactor);
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updateBufferObject(state->renderer.vbo, texNDC);
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renderer_object(&state->renderer, tilePosInPixel, tileSize, 0.0f,
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V3(0, 0, 0), worldTex);
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if ((tilePosInPixel.x < state->width && tilePosInPixel.x >= 0) &&
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(tilePosInPixel.y < state->height && tilePosInPixel.y >= 0))
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{
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v4 texNDC =
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v4_scale(worldAtlas->texRect[terraincoords_ground], ndcFactor);
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updateBufferObject(state->renderer.vbo, texNDC);
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renderer_object(&state->renderer, tilePosInPixel, tileSize, 0.0f,
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V3(0, 0, 0), worldTex);
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}
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}
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// NOTE(doyle): Factor to normalise sprite sheet rect coords to -1, 1
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