In this recipe, we will learn how we can apply a blur effect while drawing a texture.
In this recipe, we are going to use a Gaussian blur shader provided by Geeks3D at http://www.geeks3d.com/20100909/shader-library-gaussian-blur-post-processing-filter-in-glsl/.
We will implement a sample Cinder application to illustrate the mechanism. Perform the following steps:
Create a file inside the
assetsfolder with the namepassThru_vert.glsland put the following code snippet inside it:void main() { gl_Position = ftransform(); gl_TexCoord[0] = gl_MultiTexCoord0; gl_FrontColor = gl_Color; }Create a file inside the
assetsfolder with the namegaussian_v_frag.glslandand put the following code snippet inside it:#version 120 uniform sampler2D sceneTex; // 0 uniform float rt_w; // render target width uniform float rt_h; // render target height uniform float vx_offset; float offset[3] = float[]( 0.0, 1.3846153846, 3.2307692308 ); float weight[3] =...