func NewHeightMapRenderer() *renderstuff.Renderer {
return renderstuff.NewRenderer(
helpers.MakeProgram("HeightMap.vs", "HeightMap.fs"),
"height map",
nil,
HeightMapUpdate,
)
}
func NewLineRenderer() *LineRenderer {
renderer := LineRenderer{}
renderer.Prog = helpers.MakeProgram("Line.vs", "Line.fs")
renderer.Prog.Use()
renderer.vao = gl.GenVertexArray()
renderer.vao.Bind()
helpers.BindLocations("line", renderer.Prog, &renderer.RenLoc)
renderer.buffer = gl.GenBuffer()
renderer.buffer.Bind(gl.ARRAY_BUFFER)
helpers.SetAttribPointers(&renderer.RenLoc, &debug.LineVertex{}, false)
fmt.Println("Line render location ", renderer.RenLoc)
return &renderer
}
func NewScreenQuadRenderer() (this *renderstuff.Renderer) {
program := helpers.MakeProgram("ScreenQuad.vs", "ScreenQuad.fs")
return renderstuff.NewRenderer(program, "ScreenQuad", nil, nil)
}
func NewMeshRenderer() (this *renderstuff.Renderer) {
return renderstuff.NewRenderer(helpers.MakeProgram("Mesh.vs", "Mesh.fs"), "mesh", nil, nil)
}
func NewPortalRenderer() *renderstuff.Renderer {
program := helpers.MakeProgram("Portal.vs", "Portal.fs")
return renderstuff.NewRenderer(program, "Portal", nil, nil)
}
func NewSurfaceWaterRenderer() *renderstuff.Renderer {
program := helpers.MakeProgram("Water.vs", "Water.fs")
name := "Water"
return renderstuff.NewRenderer(program, name, nil, WaterUpdate)
}
func NewTreeRenderer() *renderstuff.Renderer {
program := helpers.MakeProgram("Sprite.vs", "Sprite.fs")
return renderstuff.NewRenderer(program, "TreeSprite", nil, TreeUpdate)
}
func NewSkyboxRenderer() *renderstuff.Renderer {
program := helpers.MakeProgram("Skybox.vs", "Skybox.fs")
return renderstuff.NewRenderer(program, "Skybox", nil, nil)
}
func NewParticleSystem(w *gamestate.World, numParticles int, Origin mgl.Vec3, initialSpeed, MaxLifetime float32) *ParticleSystem {
vertices := make([]ParticleVertex, numParticles)
directions := make([]NonTransformBuffer, numParticles)
for i := range vertices {
dir := mgl.Vec3{rand.Float32()*2 - 1, rand.Float32()*2 - 1, rand.Float32()*2 - 1}
for dir.Len() > 1 {
dir = mgl.Vec3{rand.Float32()*2 - 1, rand.Float32()*2 - 1, rand.Float32()*2 - 1}
}
dir = dir.Mul(initialSpeed)
vertices[i] = ParticleVertex{
Pos1: Origin,
Pos2: Origin.Sub(dir),
Lifetime: rand.Float32() * MaxLifetime,
}
directions[i] = NonTransformBuffer{dir}
}
buffer1, buffer2, nonTransformBuffer := gl.GenBuffer(), gl.GenBuffer(), gl.GenBuffer()
nonTransformBuffer.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, helpers.ByteSizeOfSlice(directions), directions, gl.STATIC_DRAW)
buffer1.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, helpers.ByteSizeOfSlice(vertices), vertices, gl.STREAM_DRAW)
buffer2.Bind(gl.ARRAY_BUFFER)
gl.BufferData(gl.ARRAY_BUFFER, helpers.ByteSizeOfSlice(vertices), uintptr(0), gl.STREAM_DRAW)
shapeData := CreateShapeDataBuffer()
TransformProg := gl.CreateProgram()
shader := helpers.MakeShader(gl.VERTEX_SHADER, "ParticleTFF.vs")
TransformProg.AttachShader(shader)
TransformProg.TransformFeedbackVaryings([]string{"v_Pos1", "v_Pos2", "v_Lifetime"}, gl.INTERLEAVED_ATTRIBS)
TransformProg.Link()
shader.Delete()
TransformProg.Use()
TransformLoc := ProgramLocations{}
helpers.BindLocations("particle transform", TransformProg, &TransformLoc)
renderProgram := helpers.MakeProgram("Particle.vs", "Particle.fs")
renderProgram.Use()
RenderLoc := RenderProgramLocations{}
helpers.BindLocations("particle render", renderProgram, &RenderLoc)
vaoTff1 := gl.GenVertexArray()
vaoTff2 := gl.GenVertexArray()
vaoRender1 := gl.GenVertexArray()
vaoRender2 := gl.GenVertexArray()
ps := ParticleSystem{
TransformProg: TransformProg,
TransformLoc: TransformLoc,
RenderProg: renderProgram,
RenderLoc: RenderLoc,
VaoTff1: vaoTff1,
VaoTff2: vaoTff2,
VaoRender1: vaoRender1,
VaoRender2: vaoRender2,
Data1: buffer1,
Data2: buffer2,
ShapeData: shapeData,
NonTransformBuffer: nonTransformBuffer,
NumParticles: numParticles,
Origin: Origin,
Gravity: -9.81 / 200,
InitialSpeed: initialSpeed,
MaxLifetime: MaxLifetime,
}
min_h, max_h := w.HeightMap.Bounds()
W := float32(w.HeightMap.W)
H := float32(w.HeightMap.H)
TransformProg.Use()
ps.SetUniforms()
ps.SetVaos()
TransformProg.Use()
ps.TransformLoc.HeightMap.Uniform1i(constants.TextureHeightMap)
ps.TransformLoc.LowerBound.Uniform3f(0, 0, min_h)
ps.TransformLoc.UpperBound.Uniform3f(W, H, max_h)
return &ps
}