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New example: models/rlgl_solar_system

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This commit is contained in:
Per Hultqvist 2024-11-18 12:41:48 +01:00
parent 5b33862cc1
commit af2e6d755e
1 changed files with 28 additions and 36 deletions
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52
examples/models/rlgl_solar_system/main.go
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@ -23,12 +23,15 @@ import (
const ( const (
screenWidth = 800 screenWidth = 800
screenHeight = 450 screenHeight = 450
sunRadius = 4.0 sunRadius = 4.0
earthRadius = 0.6 earthRadius = 0.6
earthOrbitRadius = 8.0
moonRadius = 0.16 moonRadius = 0.16
earthOrbitRadius = 8.0
moonOrbitRadius = 1.5 moonOrbitRadius = 1.5
rings, slices int32 = 16, 16
rings, slices = 16, 16
) )
func main() { func main() {
@ -122,42 +125,31 @@ func DrawSphereBasic(color rl.Color) {
rl.Begin(rl.Triangles) rl.Begin(rl.Triangles)
rl.Color4ub(color.R, color.G, color.B, color.A) rl.Color4ub(color.R, color.G, color.B, color.A)
for i := int32(0); i < (rings + 2); i++ { for ring := int32(0); ring < (rings + 2); ring++ {
for j := int32(0); j < slices; j++ { for slice := int32(0); slice < slices; slice++ {
ii := float64(i) rl.Vertex3f(getCoords(ring, slice))
jj := float64(j) rl.Vertex3f(getCoords(ring+1, slice+1))
rl.Vertex3f(getCoords(ring+1, slice))
x, y, z := getXYZ(ii, jj) rl.Vertex3f(getCoords(ring, slice))
rl.Vertex3f(x, y, z) rl.Vertex3f(getCoords(ring, slice+1))
rl.Vertex3f(getCoords(ring+1, slice+1))
x, y, z = getXYZ(ii+1, jj+1)
rl.Vertex3f(x, y, z)
x, y, z = getXYZ(ii+1, jj)
rl.Vertex3f(x, y, z)
x, y, z = getXYZ(ii, jj)
rl.Vertex3f(x, y, z)
x, y, z = getXYZ(ii, jj+1)
rl.Vertex3f(x, y, z)
x, y, z = getXYZ(ii+1, jj+1)
rl.Vertex3f(x, y, z)
} }
} }
rl.End() rl.End()
} }
func getXYZ(i, j float64) (float32, float32, float32) { func getCoords(ring, slice int32) (x, y, z float32) {
ringF := float64(ring)
sliceF := float64(slice)
// Calculate angels // Calculate angels
alpha := rl.Deg2rad * (270 + (180/(float64(rings)+1))*i) alpha := rl.Deg2rad * (270 + (180/(float64(rings)+1))*ringF)
beta := rl.Deg2rad * (j * 360 / float64(slices)) beta := rl.Deg2rad * (sliceF * 360 / float64(slices))
// Calculate coords // Calculate coords
x := float32(math.Cos(alpha) * math.Sin(beta)) x = float32(math.Cos(alpha) * math.Sin(beta))
y := float32(math.Sin(alpha)) y = float32(math.Sin(alpha))
z := float32(math.Cos(alpha) * math.Cos(beta)) z = float32(math.Cos(alpha) * math.Cos(beta))
return x, y, z return x, y, z
} }