3D Visualization: Lake of Fire Visual Effect
Swipe Left, Right, Up & Down
Visual Effect
Burning water flames activate as you swipe over the scene with hills and fire reaching toward the sky. Look down into a vortex.
Preparation
Hills, lake and flames prepared with 3ds Max, modified with Photoshop and texture mapped to the inside of a cube.
Special effects implemented with
WebGL. The following GLSL shader
blends two images based on
the uniform, uf_time
.
As you swipe, uf_time
increases and decreases, in floating
point values, from zero to one.
Normally it's more efficient
to process as much as possible
in the vertex shader.
Yet the fragment shader
accesses texture samples
to display fragments
of
color on the canvas.
This particular example mixes those
fragments.
Fragment Shader
precision mediump float; uniform sampler2D u_sampler0; uniform sampler2D u_sampler1; varying vec2 v_tex_coord0; uniform float uf_time; void main(void) { // Sample the first texture: vec4 v4_color0 = texture2D( u_sampler0, v_tex_coord0 ); // Sample the second texture: vec4 v4_color1 = texture2D( u_sampler1, v_tex_coord0 ); // Blend the textures // based on the value // in floating point uf_time. vec4 v4_mix = mix( v4_color0, v4_color1, uf_time ); gl_FragColor = v4_mix; }
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