From a6d3f3d779b031f8ca70510abe90fade909a8d0d Mon Sep 17 00:00:00 2001
From: ccolin
Date: Sat, 26 Dec 2020 01:21:28 +0100
Subject: textures and whatnot i forgot to commit for a while lol

---
 src/opengl_widget.cc | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

(limited to 'src/opengl_widget.cc')

diff --git a/src/opengl_widget.cc b/src/opengl_widget.cc
index f10a8c6..ca216b3 100644
--- a/src/opengl_widget.cc
+++ b/src/opengl_widget.cc
@@ -6,24 +6,31 @@
 static const GLchar *vertex_shader_source = R"glsl(
 #version 330 core
 
-layout(location = 0) in vec3 pos;
+layout(location = 0) in vec3 in_pos;
+layout(location = 1) in vec2 in_uv;
+
+out vec2 uv;
 
 uniform mat4 proj;
 uniform mat4 view;
 uniform mat4 model;
 
 void main() {
-	gl_Position = proj * view * model * vec4(pos, 1.0);
+	gl_Position = proj * view * model * vec4(in_pos, 1.0);
+	uv = in_uv;
 }
 )glsl";
 
 static const GLchar *fragment_shader_source = R"glsl(
 #version 330 core
 
+in vec2 uv;
 out vec4 final_col;
 
+uniform sampler2D tex;
+
 void main() {
-	final_col = vec4(0, 0, 0, 1);
+	final_col = texture(tex, uv);
 }
 )glsl";
 
@@ -91,7 +98,7 @@ void OpenGLWidget::initializeGL() {
 	GLuint shader_program = glCreateProgram();
 	glAttachShader(shader_program, vertex_shader);
 	glAttachShader(shader_program, fragment_shader);
-	glBindFragDataLocation(shader_program, 0, "out_color");
+	glBindFragDataLocation(shader_program, 0, "final_col");
 	glLinkProgram(shader_program);
 	glGetProgramiv(shader_program, GL_LINK_STATUS, &status);
 	if (status != GL_TRUE) {
@@ -119,6 +126,8 @@ void OpenGLWidget::initializeGL() {
 	trans.translate(0, 0, -5);
 	glUniformMatrix4fv(view_attr, 1, GL_FALSE, trans.data());
 
+	glUniform1i(glGetUniformLocation(shader_program, "tex"), 0);
+
 	glClearColor(1, 1, 1, 0);
 
 	glEnable(GL_DEPTH_TEST);
@@ -130,7 +139,7 @@ void OpenGLWidget::initializeGL() {
 
 void OpenGLWidget::resizeGL(int w, int h) {
 	QMatrix4x4 projection;
-	projection.perspective(FOV, (float) w/h, .1, 100);
+	projection.perspective(FOV, (float) w/h, .1, 1000);
 	glUniformMatrix4fv(proj_attr, 1, GL_FALSE, projection.data());
 }
 
@@ -141,9 +150,11 @@ void OpenGLWidget::paintGL() {
 	trans.translate(0, 0, -cam_dist);
 	QMatrix4x4 view = trans * rot;
 	glUniformMatrix4fv(view_attr, 1, GL_FALSE, view.data());
+	glActiveTexture(GL_TEXTURE0);
 	for (const OpenGLMesh &mesh : meshes) {
 		glUniformMatrix4fv(model_attr, 1, GL_FALSE, mesh.mat.data());
 		glBindVertexArray(mesh.vao);
+		mesh.tex->bind();
 		glDrawArrays(GL_TRIANGLES, 0, mesh.nverts);
 	}
 }
-- 
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