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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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64
examples/models/rlgl_solar_system/main.go
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@ -21,14 +21,17 @@ import (
)
const (
screenWidth = 800
screenHeight = 450
sunRadius = 4.0
earthRadius = 0.6
earthOrbitRadius = 8.0
moonRadius = 0.16
moonOrbitRadius = 1.5
rings, slices int32 = 16, 16
screenWidth = 800
screenHeight = 450
sunRadius = 4.0
earthRadius = 0.6
moonRadius = 0.16
earthOrbitRadius = 8.0
moonOrbitRadius = 1.5
rings, slices = 16, 16
)
func main() {
@ -122,42 +125,31 @@ func DrawSphereBasic(color rl.Color) {
rl.Begin(rl.Triangles)
rl.Color4ub(color.R, color.G, color.B, color.A)
for i := int32(0); i < (rings + 2); i++ {
for j := int32(0); j < slices; j++ {
ii := float64(i)
jj := float64(j)
x, y, z := getXYZ(ii, jj)
rl.Vertex3f(x, y, z)
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)
for ring := int32(0); ring < (rings + 2); ring++ {
for slice := int32(0); slice < slices; slice++ {
rl.Vertex3f(getCoords(ring, slice))
rl.Vertex3f(getCoords(ring+1, slice+1))
rl.Vertex3f(getCoords(ring+1, slice))
rl.Vertex3f(getCoords(ring, slice))
rl.Vertex3f(getCoords(ring, slice+1))
rl.Vertex3f(getCoords(ring+1, slice+1))
}
}
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
alpha := rl.Deg2rad * (270 + (180/(float64(rings)+1))*i)
beta := rl.Deg2rad * (j * 360 / float64(slices))
alpha := rl.Deg2rad * (270 + (180/(float64(rings)+1))*ringF)
beta := rl.Deg2rad * (sliceF * 360 / float64(slices))
// Calculate coords
x := float32(math.Cos(alpha) * math.Sin(beta))
y := float32(math.Sin(alpha))
z := float32(math.Cos(alpha) * math.Cos(beta))
x = float32(math.Cos(alpha) * math.Sin(beta))
y = float32(math.Sin(alpha))
z = float32(math.Cos(alpha) * math.Cos(beta))
return x, y, z
}