DirectX 10 Geometry Shader Solution

If you receive a Directx 10 Geometry Shader error, this tutorial is here to help you.

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The Geometry Shader is the latest addition to the DX10 APIs that gives programmers the ability to create entirely new geometry and disrupt existing geometry using graphic design hardware, allowing for more complex effects like explosions, lifelike growth, decomposition (new addition). bought effects here :-)), etc. without rebooting the main grid.

This tutorial covers all the basics of using the geometry shader space available in DX10 +. Geometric levelIt is considered extremely useful for rendering sprites, billboards, and particle systems. This is the first page in a three-part series that might focus on billboard geometry shaders and blocking systems.

The geometry shader step was introduced in DX10, and people initially thought it should be useful for tessellation purposes (which should be true), but more useful for use with particle systems and sprite rendering. The geometry step is between the vertex in combination with the pixel shader steps, and its main practice is to create new primitives away from them.

To summarize, the vertices are sent to the vertex shader in a vertex buffer stored in the GPU. A drag and drop call made in the API sends any type of vertex buffer to the pipeline. Each vertex first goes to a vertex shader, where they are transformed as needed, and the dog’s vertex data is modified (as needed). After the vertices are processed and returned by this vertex shader, they are combined into primitives in the stepprimitive configuration of their API. The type of primitive initially created from vertices crossing the top of an obstacle depends on the specified topology of the primitive (points, lines, and triangles). in pixels) before they reach their pixel shader level and are finally drawn on the screen.

The Geometric Shader (GS) is a very good extra shader layer that combines vertex shader and assembly layer primitives, or just extra pixel shader layers between vertices (in a high-level view). primitives that leave the vertex shader enter the medieval build phase, after which they move to a specific screen display phase (Figure 1a). When GS is present, vertices are initially sent from vertex to shader GS before primitive assembly is complete. GS accepts a completely new primitive as input, a completely new one; represents the number of vertices that GS receives from a vertex shader, determined by a set of primitive topology. If our topology is defined on points, GS will take only one vertex, at the same time inTime GS will accept 2 or 3 vertices for lines and triangles. GS then uses the vertex data associated with the input primitives to create new ones, whose vertices exactly form the new primitives. These newly invented vertices are generated by the GS as a stream of vertices and sent as a primitive at the build stage before finally passing through the pipeline (Figure 1b). Thus, GS takes the entire primitive as input and also generates whole primitives as a vertex list.

Now it doesn’t seem very interesting to send primitives to GS primarily for output, but since GS can output many primitives from a single primitive it becomes much more useful. This means that we can additionally place one triangle in the GS to get 4 triangles (which is your base for creating a basic tessellation with a definitely geometry shader, see Figure 2). In GS, there would be no correlation between the input primitive and the output primitive, so you can just put the string next to the output triangles. In this p In the tutorial, we usually explore using For gs when rendering sprites, as this is a simple example to demonstrate the benefits of GS. A sprite is a two-dimensional textured quad that is displayed in the current screen space (seamless clip space) so that the software is always aligned to the screen. Sprites are often used when rendering games as text, cursors, and a GUI.

So let’s talk a little about sprites before moving on to the geometry shader. Mentioned because each sprite is just a textured quad. Sprites of different sizes and positions are usually controlled by specific sets of values, anchor point position, and sprite dimensions. The idea of ​​an anchor is a point on a sprite, which in turn is used to position it, and a specific size refers to the size and size of the sprite. The most commonly used anchor point for sprites is the top-left vertex, such as a quadrangle (see Figure 3a). Thus, for their most basic spwrists, we humans need two sets of values, and render sprites are in screen space, these views are two-dimensional (x, y) and run in pixels. For example, if we want a banner with a size of 200 × 100 pixels in the middle of our set of 1024 × 768. The screw point will be 412 pixels, at 0 pixels in width and height it will be 200 pixels or 100 pixels. Most sprites usually create additional properties such as the opacity mark in a and z order (pseudo depth value). In this way, the basic structure of the sprite can be defined, as shown in Figure 3b. Now this should be noted because, as you remember, I said that the sprites are positioned to implement pixel values, they were actually located in clip space), but we’ll talk about that later. For now, keep in mind that the final coordinates that will be sent to the pipeline are required for consistent clip space. So

Okay, let’s motivate now to bring this structure back. Usually we will probably need two triangles to make a quadrilateral a, useBy creating triangular stripes to reduce the actual number of vertices needed. Again, this means we have to render the fourth vertices for each sprite. Each vertex contains the position of the 2D clipping space; 2. The most important texture coordinates and sprite properties such as opacity and z-order. Assuming floating point numbers are used, each vertex will almost certainly use 24 bytes of memory, and each individual sprite will require 96 bytes of memory. So, the average GUI will have many sprites, but let’s say the average GUI uses 100 sprites. This means that each frame of the GUI can handle 9.375 KB in order to be able to send the GPU from the processor multiple times. The data transfer on the PCIE bus is quite slow, so a slower amount of data transferred by the framework will help improve performance. Of course, 9KB is not trustworthy, but consider the fact that experts claim that systemsParticles are usually rendered with symbols (which are like sprites, where they are just textured quads) and quads. “One particle emitter can be responsible for this. a few may be a thousand particles. In such circumstances, storage costs add up. In addition, it costs a lot of money to create drug vertices in the frame for each sprite on the processor.

Now that we know we can grow some new primitives from the ones commonly found in GS, we can use this to your advantage and make the rectangle within the GS bound. Now, ideally, we would like to send our sprite structure straight to GS and render the double triangles. Well, you know these things, we can do it! Vertices must be structures, so we are going to design a vertex for each sprite structure that will be populated with all the required sprite data. What use of data transmission should we send to some GS? Well, just the spine point, dimensions and all the properties of the sprite. Texture coordinates mGS can be calculated as will be published later. Our sprites should now be 24 bytes (75% reduction !!).

But how do you get those vertices back into the pipeline so that GS is best at fetching data from a single sprite? So what primitive on Earth uses only one vertex? Point. If we create a vertex load containing sprite data and send it to the pipeline as a point representative

Speed up your computer's performance now with this simple download.