From d781d5a3c1ec6872361db2a15786dfc0db9780f3 Mon Sep 17 00:00:00 2001
From: Matthew Kosarek <mattkae@protonmail.com>
Date: Tue, 5 Oct 2021 06:35:09 -0400
Subject: Working tree render, now just have to do the leaves

---
 themes/deprecated/TreeRenderer.cpp | 57 ++++++++++++++++++++++++++++++++++++++
 themes/deprecated/TreeRenderer.h   | 36 ++++++++++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 themes/deprecated/TreeRenderer.cpp
 create mode 100644 themes/deprecated/TreeRenderer.h

(limited to 'themes/deprecated')

diff --git a/themes/deprecated/TreeRenderer.cpp b/themes/deprecated/TreeRenderer.cpp
new file mode 100644
index 0000000..ef1ed79
--- /dev/null
+++ b/themes/deprecated/TreeRenderer.cpp
@@ -0,0 +1,57 @@
+#include "TreeRenderer.h"
+#include "WebglContext.h"
+#include "mathlib.h"
+#include <GLES2/gl2.h>
+
+const char* TreeRendererVertexShader = 
+"attribute vec2 position; \n"
+"attribute vec4 color; \n"
+"uniform mat4 projection; \n"
+"uniform mat4 model; \n"
+"varying lowp vec4 VertexColor; \n"
+"void main() { \n"
+"    vec4 fragmentPosition = projection * model * vec4(position.x, position.y, 1, 1); \n"
+"    gl_Position = fragmentPosition; \n"
+"    VertexColor = color; \n"
+"}";
+
+const char* TreeRendererFragmentShader = 
+"varying lowp vec4 VertexColor; \n"
+"void main() { \n"
+"    gl_FragColor = VertexColor; \n"
+"}";
+
+void TreeRenderer::load(WebglContext* context) {
+	printf("Compiling TreeRenderer shader...\n");
+	shader = loadShader(TreeRendererVertexShader, TreeRendererFragmentShader);
+
+	useShader(shader);
+	attributes.position = getShaderAttribute(shader, "position");
+	attributes.color = getShaderAttribute(shader, "color");
+	uniforms.projection = getShaderUniform(shader, "projection");
+	uniforms.model = getShaderUniform(shader, "model");
+	projection = Mat4x4().getOrthographicMatrix(0, context->width, 0, context->height);
+
+	printf("TreeRenderer shader compiled.\n");
+}
+	
+void TreeRenderer::render(float32 dtSeconds) {
+    timeElapsed += dtSeconds;
+
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LEQUAL);
+	glDepthMask(GL_TRUE);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	glEnable(GL_BLEND);
+	glClearColor(clearColor.x, clearColor.y, clearColor.z, clearColor.w);
+	glClearDepth(1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+	useShader(shader);
+	setShaderMat4(uniforms.projection, projection);
+}
+
+void TreeRenderer::unload() {
+	glClearColor(0.f, 0.f, 0.f, 0.f);
+    glClear(GL_COLOR_BUFFER_BIT);
+	glDeleteProgram(shader);
+}
diff --git a/themes/deprecated/TreeRenderer.h b/themes/deprecated/TreeRenderer.h
new file mode 100644
index 0000000..8a8bf7f
--- /dev/null
+++ b/themes/deprecated/TreeRenderer.h
@@ -0,0 +1,36 @@
+#pragma once
+
+#include "WebglContext.h"
+#include "types.h"
+#include "Shader.h"
+#include "mathlib.h"
+
+struct WebglContext;
+
+struct TreeRenderer {
+	Mat4x4 projection;
+	uint32 shader;
+    Vector4 clearColor;
+
+	struct {
+		int32 position;
+		int32 color;
+	} attributes;
+
+	struct {
+		int32 projection;
+		int32 model;
+	} uniforms;
+
+    float32 timeElapsed = 0.f;
+    float32 frequency = 5.f;
+
+	void load(WebglContext* context);
+	void render(float32 dtSeconds);
+	void unload();
+};
+
+struct TreeRendererVertex {
+	Vector2 position;
+	Vector4 color;
+};
-- 
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