diff options
Diffstat (limited to 'src/com/android/noisefield/noisefield.rs')
| -rw-r--r-- | src/com/android/noisefield/noisefield.rs | 101 |
1 files changed, 66 insertions, 35 deletions
diff --git a/src/com/android/noisefield/noisefield.rs b/src/com/android/noisefield/noisefield.rs index f6b16d8..751f603 100644 --- a/src/com/android/noisefield/noisefield.rs +++ b/src/com/android/noisefield/noisefield.rs @@ -49,7 +49,7 @@ rs_mesh dotMesh; rs_mesh gBackgroundMesh; float densityDPI; -float xOffset = 0.0; +bool touchDown = false; #define B 0x100 #define BM 0xff @@ -60,30 +60,31 @@ static float g3[B + B + 2][3]; static float g2[B + B + 2][2]; static float g1[B + B + 2]; -static float noise_sCurve(float t) -{ +// used for motion easing from touch to non-touch state +static float touchInfluence = 0; + +static float touchX = 0; +static float touchY = 0; + +static float noise_sCurve(float t) { return t * t * (3.0f - 2.0f * t); } -static void normalizef2(float v[]) -{ +static void normalizef2(float v[]) { float s = (float)sqrt(v[0] * v[0] + v[1] * v[1]); v[0] = v[0] / s; v[1] = v[1] / s; } -static void normalizef3(float v[]) -{ +static void normalizef3(float v[]) { float s = (float)sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]); v[0] = v[0] / s; v[1] = v[1] / s; v[2] = v[2] / s; } -void init() -{ +void init() { int i, j, k; - for (i = 0; i < B; i++) { p[i] = i; @@ -114,8 +115,7 @@ void init() } } -static float noisef2(float x, float y) -{ +static float noisef2(float x, float y) { int bx0, bx1, by0, by1, b00, b10, b01, b11; float rx0, rx1, ry0, ry1, sx, sy, a, b, t, u, v; float *q; @@ -155,10 +155,10 @@ static float noisef2(float x, float y) return 1.5f * mix(a, b, sy); } -void positionParticles(){ +void positionParticles() { Particle_t* particle = dotParticles; int size = rsAllocationGetDimX(rsGetAllocation(dotParticles)); - for(int i=0; i<size; i++){ + for(int i=0; i<size; i++) { particle->position.x = rsRand(-1.0f, 1.0f); particle->position.y = rsRand(-1.0f, 1.0f); particle->speed = rsRand(0.0002f, 0.02f); @@ -171,16 +171,26 @@ void positionParticles(){ } } -int root(){ - rsgClearColor(0.0, 0.0, 0.0, 1.0f); - - VertexColor* vert = vertexColors; - int size = rsAllocationGetDimX(rsGetAllocation(vertexColors)); - for(int i=0; i<size; i++){ - vert->offsetX = xOffset; - vert++; +void touch(float x, float y) { + bool landscape = rsgGetWidth() > rsgGetHeight(); + float wRatio; + float hRatio; + if(!landscape){ + wRatio = 1.0; + hRatio = rsgGetHeight()/rsgGetWidth(); + } else { + hRatio = 1.0; + wRatio = rsgGetWidth()/rsgGetHeight(); } + touchInfluence = 1.0; + touchX = x/rsgGetWidth() * wRatio * 2 - wRatio; + touchY = -(y/rsgGetHeight() * hRatio * 2 - hRatio); +} + +int root() { + rsgClearColor(0.0, 0.0, 0.0, 1.0f); + int size = rsAllocationGetDimX(rsGetAllocation(vertexColors)); rsgBindProgramVertex(vertDots); rsgBindProgramFragment(fragDots); rsgBindTexture(fragDots, 0, textureDot); @@ -194,11 +204,13 @@ int root(){ // dots Particle_t* particle = dotParticles; size = rsAllocationGetDimX(rsGetAllocation(dotParticles)); - for(int i=0; i<size; i++){ + float rads; + float speed; + for(int i=0; i<size; i++) { if(particle->life < 0 || particle->position.x < -1.2 || particle->position.x >1.2 || particle->position.y < -1.7 || - particle->position.y >1.7){ + particle->position.y >1.7) { particle->position.x = rsRand(-1.0f, 1.0f); particle->position.y = rsRand(-1.0f, 1.0f); particle->speed = rsRand(0.0002f, 0.02f); @@ -209,35 +221,52 @@ int root(){ particle->alpha = particle->alphaStart; } + float touchDist = sqrt(pow(touchX - particle->position.x, 2) + + pow(touchY - particle->position.y, 2)); + float noiseval = noisef2(particle->position.x, particle->position.y); + if(touchDown || touchInfluence > 0.0) { + if(touchDown){ + touchInfluence = 1.0; + } + rads = atan2(touchX - particle->position.x + noiseval, + touchY - particle->position.y + noiseval); + if(touchDist != 0){ + speed = ( (0.25 + (noiseval * particle->speed + 0.01)) / touchDist * 0.3 ); + speed = speed * touchInfluence; + } else { + speed = .3; + } + particle->position.x += cos(rads) * speed * 0.2; + particle->position.y += sin(rads) * speed * 0.2; + } - float speed = noiseval * particle->speed + 0.01; float angle = 360 * noiseval * particle->wander; - float rads = angle * 3.14159265 / 180.0; + speed = noiseval * particle->speed + 0.01; + rads = angle * 3.14159265 / 180.0; - particle->position.x += cos(rads) * speed * 0.24; - particle->position.y += sin(rads) * speed * 0.24; + particle->position.x += cos(rads) * speed * 0.33; + particle->position.y += sin(rads) * speed * 0.33; particle->life--; particle->death++; float dist = sqrt(particle->position.x*particle->position.x + particle->position.y*particle->position.y); - if(dist < 0.95){ + if(dist < 0.95) { dist = 0; particle->alphaStart *= (1-dist); - } else { dist = dist-0.95; - if(particle->alphaStart < 1.0f){ + if(particle->alphaStart < 1.0f) { particle->alphaStart +=0.01; particle->alphaStart *= (1-dist); } } - if(particle->death < 101){ + if(particle->death < 101) { particle->alpha = (particle->alphaStart)*(particle->death)/100.0; - } else if(particle->life < 101){ + } else if(particle->life < 101) { particle->alpha = particle->alpha*particle->life/100.0; } else { particle->alpha = particle->alphaStart; @@ -246,6 +275,8 @@ int root(){ particle++; } + if(touchInfluence > 0) { + touchInfluence-=0.01; + } return 35; - -} +}
\ No newline at end of file |