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- [Instructor] Updating the engine.

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Previously we looked at coding

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the load level function.

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In this video, we're going to load

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sprite sheet texture
and draw vertex array.

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To get started, open the engine.cpp file,

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and add a line of code that will load

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the sprite sheet texture

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at the end of the engine constructor.

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After associate the
sprite with the texture,

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write a comment, load the texture

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for the background vertex array.

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Then, m_TextureTiles
equal to TextureHolder,

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GetTexture graphics/tiles_sheet.png.

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In this line we're loading

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the sprite sheet into m_TextureTiles.

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Now, open the update.cpp file.

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We'll make some changes
and additions to this file.

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After spawn Thomas and Bob comment,

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we have m_Thomas.spawn.

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We have to comment out this line

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and the next line well,

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and also m_TimeRemaining

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and m_NewLevelRequired.

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Now, first comment load a level,

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then write loadLevel function.

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Actually, you should delete

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rather than comment out the lines

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we are no longer using.

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I've just shown it to you this way

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so that the changes are clear.

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All that should be in the if statement

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is the call to loadLevel.

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Finally, before we can see the results

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of the work so far this section,

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open the draw.cpp file.

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We'll make some additions

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to draw the vertex array
that represents a level.

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Now, inside the draw function

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after m_Window.setView,

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write a comment, draw the level,

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and then m_Window.draw,

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m_VALevel, and m_TextureTiles.

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Here we draw the vertex array

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that represents a level.

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Now, we have to add the same line again

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in the split screen view.

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We do the same for RightView.

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We have drawn the vertex array

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for all screen options,
right, left, full screen.

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Now you can run the game.

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Unfortunately, however, Thomas and Bob

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fall straight through

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all of our lovingly designed platforms.

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You can press enter and see that.

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For this reason, we can't try

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and progress through the levels

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and beat the clock.

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We'll work on that in some time.

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This video taught us how to update

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the game engine.

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Amazing.

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In the next video, we'll
see collision detection.