CODEWITHSUNDEEP
c++directxlinesbullet
theCNG27
theCNG27

Reputation: 425

DirectX 11 - Bullet Debug Draw

I am using Bullet Physics in my own DirectX 11 Game Engine and i want to use the debug draw class provided by bullet. Basicly you are creating a class, that receives all the lines that should be drawn by bullet. Is there an easy and fast way to just draw a 3D Line in DirectX 11 (preferably without using buffers and shaders and all that stuff)?

Upvotes: 1

Views: 2213

Answers (3)

Duane
Duane

Reputation: 1

Any chance of using a triangle in lit wire-frame and making 2 of the verts the same location: x1y1z1,x2y2z2,x2y2z2 I do this in DBPro and it works.

Upvotes: 0

Jesus Ramos
Jesus Ramos

Reputation: 23266

Use LP3DXLINE and call D3DXCreateLine to draw a simple line. Calling Draw with an array of length 2 (start, end) for your line and it should work.

EDIT: This is apparently only DX9. Leaving answer here just in case it helps someone else.

Upvotes: 1

Nico Schertler
Nico Schertler

Reputation: 32627

Unfortunately, there is no easy way. You need to create a vertex buffer with the line points. If you want to draw multiple lines, put all your vertices in one buffer to optimize for performance.

Because the FFP has been removed in DirectX 10, you need a simple shader. The vertex shader probably just transforms the vertices with view and projection transform and the pixel shader returns a constant color (depending on your needs).

You would then draw the vertex buffer with an appropriate topology (line list).

The reason why there are no easy methods (like Jesus Ramos' answer or OpenGL's glBegin(GL_LINES)) is that they cannot be implemented efficiently. It is always necessary to transfer more data to the GPU than needed. That's why it's up to the programmer to write efficient code using buffers.

Upvotes: 4

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