diff options
Diffstat (limited to 'tests/glsl/sascha-willems/computeparticles')
3 files changed, 124 insertions, 0 deletions
diff --git a/tests/glsl/sascha-willems/computeparticles/particle.comp b/tests/glsl/sascha-willems/computeparticles/particle.comp new file mode 100644 index 000000000..4faf181a4 --- /dev/null +++ b/tests/glsl/sascha-willems/computeparticles/particle.comp @@ -0,0 +1,80 @@ +#version 450 +//TEST:COMPARE_GLSL: + +#extension GL_ARB_separate_shader_objects : enable +#extension GL_ARB_shading_language_420pack : enable + +struct Particle +{ + vec2 pos; + vec2 vel; + vec4 gradientPos; +}; + +// Binding 0 : Position storage buffer +layout(std140, binding = 0) buffer Pos +{ + Particle particles[ ]; +}; + +layout (local_size_x = 256) in; + +layout (binding = 1) uniform UBO +{ + float deltaT; + float destX; + float destY; + int particleCount; +} ubo; + +vec2 attraction(vec2 pos, vec2 attractPos) +{ + vec2 delta = attractPos - pos; + const float damp = 0.5; + float dDampedDot = dot(delta, delta) + damp; + float invDist = 1.0f / sqrt(dDampedDot); + float invDistCubed = invDist*invDist*invDist; + return delta * invDistCubed * 0.0035; +} + +vec2 repulsion(vec2 pos, vec2 attractPos) +{ + vec2 delta = attractPos - pos; + float targetDistance = sqrt(dot(delta, delta)); + return delta * (1.0 / (targetDistance * targetDistance * targetDistance)) * -0.000035; +} + +void main() +{ + // Current SSBO index + uint index = gl_GlobalInvocationID.x; + // Don't try to write beyond particle count + if (index >= ubo.particleCount) + return; + + // Read position and velocity + vec2 vVel = particles[index].vel.xy; + vec2 vPos = particles[index].pos.xy; + + vec2 destPos = vec2(ubo.destX, ubo.destY); + + vec2 delta = destPos - vPos; + float targetDistance = sqrt(dot(delta, delta)); + vVel += repulsion(vPos, destPos.xy) * 0.05; + + // Move by velocity + vPos += vVel * ubo.deltaT; + + // collide with boundary + if ((vPos.x < -1.0) || (vPos.x > 1.0) || (vPos.y < -1.0) || (vPos.y > 1.0)) + vVel = (-vVel * 0.1) + attraction(vPos, destPos) * 12; + else + particles[index].pos.xy = vPos; + + // Write back + particles[index].vel.xy = vVel; + particles[index].gradientPos.x += 0.02 * ubo.deltaT; + if (particles[index].gradientPos.x > 1.0) + particles[index].gradientPos.x -= 1.0; +} + diff --git a/tests/glsl/sascha-willems/computeparticles/particle.frag b/tests/glsl/sascha-willems/computeparticles/particle.frag new file mode 100644 index 000000000..ac6077261 --- /dev/null +++ b/tests/glsl/sascha-willems/computeparticles/particle.frag @@ -0,0 +1,19 @@ +#version 450 +//TEST:COMPARE_GLSL: + +#extension GL_ARB_separate_shader_objects : enable +#extension GL_ARB_shading_language_420pack : enable + +layout (binding = 0) uniform sampler2D samplerColorMap; +layout (binding = 1) uniform sampler2D samplerGradientRamp; + +layout (location = 0) in vec4 inColor; +layout (location = 1) in float inGradientPos; + +layout (location = 0) out vec4 outFragColor; + +void main () +{ + vec3 color = texture(samplerGradientRamp, vec2(inGradientPos, 0.0)).rgb; + outFragColor.rgb = texture(samplerColorMap, gl_PointCoord).rgb * color; +} diff --git a/tests/glsl/sascha-willems/computeparticles/particle.vert b/tests/glsl/sascha-willems/computeparticles/particle.vert new file mode 100644 index 000000000..b134c4898 --- /dev/null +++ b/tests/glsl/sascha-willems/computeparticles/particle.vert @@ -0,0 +1,25 @@ +#version 450 +//TEST:COMPARE_GLSL: + +#extension GL_ARB_separate_shader_objects : enable +#extension GL_ARB_shading_language_420pack : enable + +layout (location = 0) in vec2 inPos; +layout (location = 1) in vec4 inGradientPos; + +layout (location = 0) out vec4 outColor; +layout (location = 1) out float outGradientPos; + +out gl_PerVertex +{ + vec4 gl_Position; + float gl_PointSize; +}; + +void main () +{ + gl_PointSize = 8.0; + outColor = vec4(0.035); + outGradientPos = inGradientPos.x; + gl_Position = vec4(inPos.xy, 1.0, 1.0); +}
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