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Ep4: Buffers package

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bloeys
2021-10-30 23:10:11 +04:00
parent 5e3123b00e
commit 2b341132f8
7 changed files with 271 additions and 23 deletions
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40
main.go
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@ -19,6 +19,7 @@ var (
window *sdl.Window
simpleShader shaders.ShaderProgram
bo *buffers.BufferObject
)
func main() {
@ -42,8 +43,13 @@ func main() {
initOpenGL()
loadShaders()
loadBuffers()
buffers.HandleBuffers(simpleShader)
simpleShader.SetAttribute("vertPos", bo, bo.VertPosBuf)
simpleShader.EnableAttribute("vertPos")
simpleShader.SetAttribute("vertColor", bo, bo.ColorBuf)
simpleShader.EnableAttribute("vertColor")
//Game loop
for isRunning {
@ -99,6 +105,33 @@ func loadShaders() {
simpleShader.Link()
}
func loadBuffers() {
vertices := []float32{
-0.5, 0.5, 0,
0.5, 0.5, 0,
-0.5, -0.5, 0,
0.5, 0.5, 0,
0.5, -0.5, 0,
-0.5, -0.5, 0,
}
colors := []float32{
1, 0, 0,
0, 0, 1,
0, 0, 1,
0, 0, 1,
0, 0, 1,
0, 0, 1,
}
bo = buffers.NewBufferObject()
bo.GenBuffer(vertices, buffers.BufUsageStatic, buffers.BufTypeVertPos, buffers.DataTypeVec3)
bo.GenBuffer(colors, buffers.BufUsageStatic, buffers.BufTypeColor, buffers.DataTypeVec3)
}
func handleInputs() {
input.EventLoopStart()
@ -125,9 +158,12 @@ func draw() {
gl.Clear(gl.COLOR_BUFFER_BIT)
simpleShader.Use()
simpleShader.Activate()
//DRAW
bo.Activate()
gl.DrawArrays(gl.TRIANGLES, 0, 6)
bo.Deactivate()
window.GLSwap()
}