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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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29
shaders/shader_program.go
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@ -1,6 +1,7 @@
package shaders
import (
"github.com/bloeys/go-sdl-engine/buffers"
"github.com/bloeys/go-sdl-engine/logging"
"github.com/go-gl/gl/v4.6-compatibility/gl"
)
@ -36,12 +37,36 @@ func (sp *ShaderProgram) Link() {
}
}
func (sp *ShaderProgram) Activate() {
gl.UseProgram(sp.ID)
}
func (sp *ShaderProgram) Deactivate() {
gl.UseProgram(0)
}
func (sp *ShaderProgram) GetAttribLoc(attribName string) int32 {
return gl.GetAttribLocation(sp.ID, gl.Str(attribName+"\x00"))
}
func (sp *ShaderProgram) Use() {
gl.UseProgram(sp.ID)
func (sp *ShaderProgram) SetAttribute(attribName string, bufObj *buffers.BufferObject, buf *buffers.Buffer) {
bufObj.Activate()
buf.Activate()
attribLoc := sp.GetAttribLoc(attribName)
gl.VertexAttribPointer(uint32(attribLoc), buf.ElementCount, buf.ElementType, false, buf.GetSize(), gl.PtrOffset(0))
bufObj.Activate()
buf.Deactivate()
}
func (sp *ShaderProgram) EnableAttribute(attribName string) {
gl.EnableVertexAttribArray(uint32(sp.GetAttribLoc(attribName)))
}
func (sp *ShaderProgram) DisableAttribute(attribName string) {
gl.DisableVertexAttribArray(uint32(sp.GetAttribLoc(attribName)))
}
func (sp *ShaderProgram) Delete() {