diff options
Diffstat (limited to 'src/declarative/particles/defaultshaders/simplevertex.shader')
-rw-r--r-- | src/declarative/particles/defaultshaders/simplevertex.shader | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/declarative/particles/defaultshaders/simplevertex.shader b/src/declarative/particles/defaultshaders/simplevertex.shader new file mode 100644 index 0000000000..f185ef0700 --- /dev/null +++ b/src/declarative/particles/defaultshaders/simplevertex.shader @@ -0,0 +1,36 @@ +attribute highp vec2 vPos; +attribute highp vec2 vTex; +attribute highp vec4 vData; // x = time, y = lifeSpan, z = size, w = endSize +attribute highp vec4 vVec; // x,y = constant speed, z,w = acceleration + +uniform highp mat4 matrix; +uniform highp float timestamp; +uniform lowp float opacity; + +varying highp vec2 fTex; +varying lowp float fFade; + +void main() { + fTex = vTex; + highp float size = vData.z; + highp float endSize = vData.w; + + highp float t = (timestamp - vData.x) / vData.y; + + highp float currentSize = mix(size, endSize, t * t); + + if (t < 0. || t > 1.) + currentSize = 0.; + + highp vec2 pos = vPos + - currentSize / 2. + currentSize * vTex // adjust size + + vVec.xy * t * vData.y // apply speed vector.. + + 0.5 * vVec.zw * pow(t * vData.y, 2.); + + gl_Position = matrix * vec4(pos.x, pos.y, 0, 1); + + highp float fadeIn = min(t * 10., 1.); + highp float fadeOut = 1. - max(0., min((t - 0.75) * 4., 1.)); + + fFade = fadeIn * fadeOut * opacity; +} |