Witch of Git - lovr-particles/blob - main.lua

   1 local mat4 = lovr.math.mat4
   2
   3 local features
   4 local shaders = {}
   5 local blocks = {}
   6 local meshes = {}
   7
   8 function lovr.load()
   9     features = lovr.graphics.getFeatures()
  10     shaders.particles = lovr.graphics.newShader("shaders/particles.vert", "shaders/particles.frag")
  11     blocks.particles = lovr.graphics.newShaderBlock("compute", {
  12         particlePos = {"vec4", 1024},
  13     }, { readable = true, writable = true })
  14     shaders.particles:sendBlock('particleData', blocks.particles)
  15     meshes.particle = lovr.graphics.newMesh(
  16         {
  17             {'vertPosition', 'float', 2},
  18         },
  19         {{1, 1}, {1, -1}, {-1, -1}, {-1, 1}},
  20         "triangles", "static"
  21     )
  22     meshes.particle:setVertexMap({3, 2, 1, 4, 3, 1})
  23 end
  24
  25 function lovr.draw()
  26     lovr.graphics.clear()
  27     lovr.graphics.setColor(0, 0.5, 1)
  28     local x, y, z = lovr.headset.getPose("head")
  29     shaders.particles:send("headPos", {x, y, z})
  30
  31     blocks.particles:send("particlePos", {{0, 2, -2, 0}, {-1, 1, -4, 0}})
  32     lovr.graphics.setShader(shaders.particles)
  33     meshes.particle:draw(mat4(), 2)
  34 end