Moving some directories

2026-09-26 15:20:07 +02:00
parent e410d82680
commit c0952898ae
706 changed files with 0 additions and 0 deletions
@@ -0,0 +1,162 @@
+package levels
+
+import (
+	"github.com/inkyblackness/hacked/editor/render"
+	"github.com/inkyblackness/hacked/ss1/content/archive/level"
+	"github.com/inkyblackness/hacked/ui/opengl"
+)
+
+var gridVertexShaderSource = `
+#version 150
+precision mediump float;
+
+in vec3 vertexPosition;
+
+uniform mat4 viewMatrix;
+uniform mat4 projectionMatrix;
+
+out vec4 gridColor;
+out vec3 originalPosition;
+
+void main(void) {
+   gl_Position = projectionMatrix * viewMatrix * vec4(vertexPosition, 1.0);
+
+   gridColor = vec4(0.0, 0.1, 0.0, 0.6);
+   originalPosition = vertexPosition;
+}
+`
+
+var gridFragmentShaderSource = `
+#version 150
+precision mediump float;
+
+uniform vec4 gridSize;
+
+in vec4 gridColor;
+in vec3 originalPosition;
+
+out vec4 fragColor;
+
+float modulo(float x, float y) {
+   return x - y * floor(x/y);
+}
+
+float nearGrid(float stepSize, float value) {
+   float remainder = modulo(value - (stepSize / 2.0), stepSize) * 2.0;
+
+   if (remainder >= stepSize) {
+      remainder = (stepSize * 2.0) - remainder;
+   }
+
+   return remainder / stepSize;
+}
+
+void main(void) {
+   float alphaX = nearGrid(256.0, originalPosition.x);
+   float alphaY = nearGrid(256.0, originalPosition.y);
+   bool beyondX = (originalPosition.x / 256.0) >= gridSize.x || (originalPosition.x < 0.0);
+   bool beyondY = (originalPosition.y / 256.0) >= gridSize.y || (originalPosition.y < 0.0);
+   float alpha = 0.0;
+
+   if (!beyondX && !beyondY) {
+      alpha = max(alphaX, alphaY);
+   } else if (beyondX && !beyondY) {
+      alpha = alphaX;
+   } else if (beyondY && !beyondX) {
+      alpha = alphaY;
+   } else {
+      alpha = min(alphaX, alphaY);
+   }
+
+   alpha = pow(2.0, 10.0 * (alpha - 1.0));
+
+   fragColor = vec4(gridColor.rgb, gridColor.a * alpha);
+}
+`
+
+// BackgroundGrid renders a grid with transparent holes.
+type BackgroundGrid struct {
+	context *render.Context
+
+	program                 uint32
+	vao                     *opengl.VertexArrayObject
+	vertexPositionBuffer    uint32
+	vertexPositionAttrib    int32
+	gridSizeUniform         opengl.Vector4Uniform
+	viewMatrixUniform       opengl.Matrix4Uniform
+	projectionMatrixUniform opengl.Matrix4Uniform
+
+	lastReportedColumns int
+	lastReportedRows    int
+}
+
+// NewBackgroundGrid returns a new instance of BackgroundGrid.
+func NewBackgroundGrid(context *render.Context) *BackgroundGrid {
+	gl := context.OpenGL
+	program, programErr := opengl.LinkNewStandardProgram(gl, gridVertexShaderSource, gridFragmentShaderSource)
+	if programErr != nil {
+		panic(opengl.NamedShaderError{Name: "BackgroundGridShader", Nested: programErr})
+	}
+	grid := &BackgroundGrid{
+		context:                 context,
+		program:                 program,
+		vao:                     opengl.NewVertexArrayObject(gl, program),
+		vertexPositionBuffer:    gl.GenBuffers(1)[0],
+		vertexPositionAttrib:    gl.GetAttribLocation(program, "vertexPosition"),
+		viewMatrixUniform:       opengl.Matrix4Uniform(gl.GetUniformLocation(program, "viewMatrix")),
+		projectionMatrixUniform: opengl.Matrix4Uniform(gl.GetUniformLocation(program, "projectionMatrix")),
+		gridSizeUniform:         opengl.Vector4Uniform(gl.GetUniformLocation(program, "gridSize")),
+	}
+
+	return grid
+}
+
+// Render renders the grid.
+func (grid *BackgroundGrid) Render(columns, rows int) {
+	gl := grid.context.OpenGL
+
+	grid.setGridSize(columns, rows)
+
+	grid.vao.OnShader(func() {
+		grid.viewMatrixUniform.Set(gl, grid.context.ViewMatrix)
+		grid.projectionMatrixUniform.Set(gl, &grid.context.ProjectionMatrix)
+		grid.gridSizeUniform.Set(gl, &[4]float32{float32(columns), float32(rows), 0, 0})
+
+		gl.DrawArrays(opengl.TRIANGLES, 0, 6)
+	})
+}
+
+func (grid *BackgroundGrid) setGridSize(columns, rows int) {
+	if (grid.lastReportedColumns == columns) && (grid.lastReportedRows == rows) {
+		return
+	}
+	grid.lastReportedColumns = columns
+	grid.lastReportedRows = rows
+
+	gl := grid.context.OpenGL
+	{
+		hTiles := float32(columns)
+		vTiles := float32(rows)
+
+		gl.BindBuffer(opengl.ARRAY_BUFFER, grid.vertexPositionBuffer)
+		fineHalf := level.FineCoordinatesPerTileSide / float32(2.0)
+		hLimit := level.FineCoordinatesPerTileSide*hTiles + fineHalf
+		vLimit := level.FineCoordinatesPerTileSide*vTiles + fineHalf
+		var vertices = []float32{
+			-fineHalf, -fineHalf, 0.0,
+			hLimit, -fineHalf, 0.0,
+			hLimit, vLimit, 0.0,
+
+			hLimit, vLimit, 0.0,
+			-fineHalf, vLimit, 0.0,
+			-fineHalf, -fineHalf, 0.0}
+		gl.BufferData(opengl.ARRAY_BUFFER, len(vertices)*4, vertices, opengl.STATIC_DRAW)
+		gl.BindBuffer(opengl.ARRAY_BUFFER, 0)
+	}
+	grid.vao.WithSetter(func(gl opengl.OpenGL) {
+		gl.EnableVertexAttribArray(uint32(grid.vertexPositionAttrib))
+		gl.BindBuffer(opengl.ARRAY_BUFFER, grid.vertexPositionBuffer)
+		gl.VertexAttribOffset(uint32(grid.vertexPositionAttrib), 3, opengl.FLOAT, false, 0, 0)
+		gl.BindBuffer(opengl.ARRAY_BUFFER, 0)
+	})
+}